H.J.B. v. A - J.A.B. Judgment Affirmed JUSTICE BERKENKOTTER delivered the Opinion of the Court, in which CHIEF JUSTICE BOATRIGHT JUSTICE MÁRQUEZ JUSTICE HOOD JUSTICE GABRIEL JUSTICE HART

that assertion of general Indian heritage, and to learn whether additional

information exists that will help the court determine whether there is reason to

know that the child is an Indian child.

      Applying this framework, the supreme court affirms the division, but on

different grounds.
                  The Supreme Court of the State of Colorado
                  2 East 14th Avenue • Denver, Colorado 80203

                                    

                       Supreme Court Case No. 22SC670
                     Certiorari to the Colorado Court of Appeals
                      Court of Appeals Case No. 21CA764

                                    Petitioner:

                                       H.J.B.,

                                         v.

                                   Respondent:

                       The People of the State of Colorado,

                         In the Interest of Minor Child:

                                      A-J.A.B.

                               Judgment Affirmed
                                     en banc
                                September 11, 2023


Attorneys for Petitioner:
The Morgan Law Office
Kristofr P. Morgan
      Colorado Springs, Colorado

Attorneys for Respondent:
Adams County Attorney’s Office
Katherine Gregg, Deputy County Attorney
      Westminster, Colorado
Attorney for Minor Child:
Josi McCauley, guardian ad litem
      Superior, Colorado

Attorney for Amicus Curiae Colorado Office of Respondent Parents’ Counsel:
Zaven T. Saroyan
      Denver, Colorado

Attorneys for Amici Curiae Southern Ute Indian Tribe and Ute Mountain Ute
Tribe:
David C. Smith
Lorelyn Hall
James Washinawatok II
       Ignacio, Colorado

Peter Ortego
      Towaoc, Colorado




JUSTICE BERKENKOTTER delivered the Opinion of the Court, in which
CHIEF JUSTICE BOATRIGHT, JUSTICE MARQUEZ, JUSTICE HOOD, III,
JUSTICE GABRIEL, JUSTICE HART, and JUSTICE SAMOUR, Jr. joined.



                                     2
JUSTICE BERKENKOTTER delivered the Opinion of the Court.

¶1    The federal Indian Child Welfare Act (“ICWA”) was enacted in 1978 amidst

a rising crisis in Indian Country: Abusive child welfare practices resulted in up to

a third of all Indian children being forcibly removed from their homes and sent

off-reservation to be fostered and adopted by non-Indian families. See Felix

Cohen, Handbook of Federal Indian Law §§ 11.01[1], [2] (Nell Jessup Newton ed.,

2012); see also People in Int. of My. K.M. v. V.K.L., 

, 

, 139

(“Congress enacted ICWA in response to ‘an alarmingly high percentage of Indian

families broken up by the removal, often unwarranted, of their children from them

by nontribal public and private agencies.’”) (citation omitted). As Indian tribes

and families faced the loss of their children, Congress codified “substantive and

procedural guardrails against the unjustified termination of parental rights and

removal of Indian children from tribal life.” Haaland v. Brackeen, 

,

1646 (2023) (Gorsuch, J., concurring); V.K.L., ¶¶ 22-23, 512 P.3d at 140.

¶2    Among these important guardrails are ICWA’s notice provisions. One

purpose of these provisions is to ensure that Indian tribes know about their right

to intervene in, or, where appropriate, exercise jurisdiction over child custody

proceedings involving an Indian child. 

(a).1 To that end, both


1  ICWA defines an Indian child as “any unmarried person who is under age
eighteen and is either (a) a member of an Indian tribe or (b) is eligible for

                                           3
ICWA and Colorado’s ICWA implementing statute, section 19-1-126, C.R.S. (2022),

impose specific notice requirements. Thus, if a juvenile court in a dependency and

neglect case2 “knows” a child is an Indian child, ICWA requires the court to ensure

that the petitioning party complies with the notice requirements found in 

 (2023). Colorado’s ICWA statute requires compliance with the same

notice provision. § 19-1-126(1)(b); see also 

(a).

¶3    And when the juvenile court does not “know,” but instead has “reason to

know,” that a child is an Indian child, the court has the same obligation to ensure

compliance with ICWA’s notice provision. § 19-1-126(1)(b); 

(a);

. In these cases, the court must treat the child as an Indian child

until it is determined on the record that the child does not meet the definition of

an Indian child. § 19-1-126(2)(b).

¶4    But in some cases, a juvenile court is presented with a more general assertion

that a child has Indian heritage. In some, like the case here, a parent asserts that a




membership in an Indian tribe and is the biological child of a member of an Indian
tribe.” 

(4).
2 We recognize that the federal and Colorado ICWA statutes apply to cases other
than dependency and neglect cases, see 

(a). But because a
department of social services is the exclusive party authorized to file a dependency
and neglect petition, McCall v. Dist. Ct., 

, 394 (Colo. 1982), and because,
here, the Adams County Human Services Department moved to terminate the
mother’s parental rights, we limit our discussion to the requirements imposed on
departments of social services.
                                          4
member of the child’s family may have Indian heritage through a particular tribe

or a tribal ancestry group. That type of information, without more—as this court

concluded last year in People in Int. of E.A.M. v. D.R.M., 

, ¶ 56, 

, 937—is not sufficient to give the court a “reason to know” that a child is an

Indian child, and thus ICWA’s notice requirements are not triggered.

¶5    Instead, these types of more generalized assertions of Indian heritage,

without more, trigger the due diligence requirement, which is an additional

obligation imposed by the General Assembly in section 19-1-126(3). Thus, when a

juvenile court doesn’t “know” or have “reason to know” that a child who is the

subject of a dependency and neglect hearing is an Indian child, but learns that the

child may have Indian heritage, the court must then direct the petitioning party to

exercise due diligence in gathering additional information that would assist the

court in determining if there is reason to know that the child is an Indian child.

§ 19-1-126(3).

¶6    But what, exactly, does that mean? More to the point, what constitutes due

diligence in the context of section 19-1-126(3)? Today, we answer that question

and identify the steps that a petitioning party must take to satisfy its due diligence

obligation under section 19-1-126(3). We then apply this framework to the facts

here and conclude that the petitioning party here satisfied its statutory due




                                          5
diligence obligation under section 19-1-126(3).        Accordingly, we affirm the

division, albeit on different grounds.

                       I. Facts and Procedural History

¶7    A-J.A.B. tested positive at birth for methamphetamine. H.J.B. (“Mother”)

admitted methamphetamine use during her pregnancy. In March 2020, less than

a month after A-J.A.B.’s birth, the Adams County Human Services Department

(“the Department”) filed a petition in dependency and neglect concerning A-J.A.B.

See People in Int. of A-J.A.B., 

, ¶ 3, 

, 753, abrogated on other

grounds by E.A.M., ¶ 56, 516 P.3d at 937 (“A-J.A.B. I”). The Department’s petition

noted that it had no information indicating that A-J.A.B. was an Indian child or

eligible for membership in an Indian tribe, although the petition did not identify

what efforts, if any, the Department took to determine whether A-J.A.B. was an

Indian child.

¶8    At the shelter hearing, Mother’s counsel informed the court that Mother

may have “some Cherokee and Lakota Sioux3 [heritage] through [A-J.A.B.’s

maternal great-grandmother].”4 Id. at ¶ 4, 511 P.3d at 753. However, Mother was



3 “Sioux” is an exonym used to describe the bands of the Lakota, Nakota, and

Dakota people. Rosebud Sioux Tribe v. United States, 

, 1026 n.8 (8th Cir.
2021) (Kobes, J., dissenting). Here, we follow the naming conventions of the
division and parties and refer to Mother’s alleged heritage as “Lakota Sioux.”
4 For ease of reference, all family members are identified based on their
relationship to A-J.A.B.
                                          6
uncertain if anyone in her family was actually registered with a tribe and

acknowledged that she “probably [wouldn’t] qualify” for any tribal membership

herself. 

 The juvenile court ordered Mother to “fill out the ICWA paperwork,”

but the court did not direct the Department to exercise its due diligence obligation

under section 19-1-126(3). 

¶9     At the next hearing, Mother, who had not filled out the ICWA paperwork,

again stated that she had “Native American heritage” through A-J.A.B.’s maternal

great-grandmother. Id. at ¶ 5, 511 P.3d at 753. Because of these assertions, the

juvenile court found that the case “‘may’ be an ICWA case.” Id. But the court did

not order the Department to take any action to investigate Mother’s claim of Indian

heritage. In June 2020, the juvenile court entered a dispositional order; the order

did not address ICWA or whether A-J.A.B. may be an Indian child.

¶10    In October 2020, “the Department’s attorney asked the court to make

another ICWA inquiry because the Department had ‘not resolved that issue’ yet.”

Id. at ¶ 6, 511 P.3d at 754. The juvenile court again stated that the case “may be an

ICWA case,” but did not expressly direct the Department to exercise its due

diligence obligation under section 19-1-126(3). Id. And again, the juvenile court

“ordered [M]other to submit an ICWA assessment form.” Id. But Mother never

did.




                                         7
¶11   In December 2020, the Department moved to terminate Mother’s parental

rights. At the pretrial conference, Mother’s attorney informed the court that she

spoke with A-J.A.B.’s maternal grandmother, who stated that she “thought that

the heritage may be Lakota.” Id. at ¶ 7, 511 P.3d at 754. A-J.A.B.’s maternal

grandmother told Mother’s attorney that “if there’s heritage then the [child’s]

great aunt would have the information.” Nonetheless, Mother’s attorney told the

court “it doesn’t sound like there’s a reason to believe that ICWA would apply”

and acknowledged that neither Mother nor A-J.A.B. were enrolled members of any

tribe. Id. The juvenile court subsequently concluded that “there [was] no reason

to believe that this case [was] governed by [ICWA].” Id. (alterations in original).

¶12   At the April 2021 termination hearing, the juvenile court reiterated that

ICWA did not apply in this case “because ‘no information ha[d] been provided to

the [c]ourt regarding the respondent [M]other’s enrollment [or] eligibility for

enrollment in a federally recognized tribe.’” Id. at ¶ 8, 511 P.3d at 754 (alterations

in original). The juvenile court terminated Mother’s parental rights. Mother

appealed.

¶13   Before a division of the court of appeals, Mother argued that the juvenile

court erred in finding that ICWA did not apply because the court had a reason to

know that A-J.A.B. was an Indian child. Id. at ¶ 9, 511 P.3d at 754; see also

§ 19-1-126(1)(a)(I)(A).   According to Mother, her assertions of Cherokee and

                                          8
Lakota Sioux heritage triggered the Department’s obligation under ICWA to send

notice of the dependency and neglect proceeding to all Cherokee and Lakota Sioux

tribes pursuant to section 19-1-126(1)(b).5 A-J.A.B. I, ¶ 9, 511 P.3d at 754. The

Department and A-J.A.B.’s guardian ad litem disagreed, maintaining that Mother

provided insufficient information to trigger the notice obligation under

section 19-1-126(1)(b) when the juvenile court was only provided vague assertions

of tribal heritage without meaningful elaboration. Id.

¶14   In a published opinion, the division agreed with Mother in part. While it

concluded that there was no reason to know A-J.A.B. was an Indian child, the

division held that the juvenile court nevertheless erred by not directing the

Department     to   exercise   its   separate   due   diligence   obligation   under

section 19-1-126(3) to assist the court in determining whether there is reason to

know that A-J.A.B. is an Indian child. Id. at ¶ 10, 511 P.3d at 754.

¶15   The division explained that when a department initiates a dependency and

neglect case, “Colorado’s ICWA statute assumes the department has already




5 “Cherokee” and “Lakota Sioux” are tribal ancestry groups, each comprising

multiple specific tribes. There are three Cherokee tribes in the United States, U.S.
Dep’t       of        the      Interior,      Tribes:       Cherokee      Ancestry,
https://www.doi.gov/tribes/cherokee (last visited Aug. 25, 2023) [https://
perma.cc/7JXW-N3DZ], and approximately sixteen Lakota Sioux tribes, see Indian
Child Welfare Act; Designated Tribal Agents for Service of Notice, 

, 30475 (May 25, 2011).
                                          9
inquired whether the subject child is an Indian child from available family

members or available extended family members.” Id. at ¶ 26, 511 P.3d at 756. This

assumption follows from a department’s obligation to disclose (1) if it has

determined whether a child is an Indian child, and (2) if it “has not determined

that the child is an Indian child,” then it must “disclose ‘in the complaint, petition,

or other commencing pleading filed with the court’ ‘what efforts’ it ‘made in

determining whether the child is an Indian child.’” Id. at ¶ 28, 511 P.3d at 756

(quoting § 19-1-126(1)(c)).

¶16   Next, the division examined Colorado’s ICWA statute, which “requires the

juvenile court to ‘make inquiries to determine whether the child who is the subject

of the proceeding is an Indian child.’” Id. at ¶ 30, 511 P.3d at 756 (quoting People

in Int. of K.C. v. K.C., 

, 

). Critically, the division

observed, the juvenile court “must ask each participant in a child-custody

proceeding ‘whether the participant knows or has reason to know that the child is

an Indian child.’” 

 (emphasis added) (quoting § 19-1-126(1)(a)(I)(A)); see also

(c) (2023).

¶17   Here, the division found that Mother’s assertions of a possible affiliation

with two tribal ancestral groups did not trigger the juvenile court to have reason

to know that A-J.A.B. is an Indian child. A-J.A.B. I, ¶ 10, 511 P.3d at 754. But the

division concluded that there can be circumstances—like those here—where the

                                          10
court “receives information that the child may have Indian heritage but does not

have sufficient information to determine that there is reason to know that the child

is an Indian child.” Id. at ¶ 56, 511 P.3d at 760 (quoting § 19-1-126(3)). In these

instances, section 19-1-126(3) requires that “the court shall direct the petitioning

. . . party to exercise due diligence in gathering additional information that would

assist the court in determining whether there is reason to know that the child is an

Indian child.” § 19-1-126(3).

¶18   Because section 19-1-126(3) does not define what “due diligence” entails, the

division crafted a three-step test which requires departments (1) to “earnestly

inquire of any person disclosing possible Indian heritage to determine the basis of

that person’s belief or understanding”; (2) to recognize that “an assertion of

possible Indian heritage may include multiple federally recognized tribes within

an affiliated ancestral group . . . [and that] section 19-1-126(3) also requires the

department to contact available family members and available extended family

members and clarify what tribal ancestral group, and federally recognized tribes

affiliated with the ancestral group, the parent or child might be affiliated with”;

and then (3) based on “these inquiries, . . . to identify any other persons, agencies,

organizations, or tribes that might have additional information about whether there

is ‘reason to know’ the child is an Indian child.” A-J.A.B. I, ¶¶ 61–63, 511 P.3d at

761. The division emphasized that the department may contact the tribe or tribes

                                         11
within the identified ancestral group or groups to identify whether there is “reason

to know” the parent or child is a member of any such tribe, noting that such contact

may be necessary when there are no other sources of additional information. Id.

at ¶ 64, 511 P.3d at 761.

¶19   In the event of such contact, the division indicated that the department

should provide as much of the information required by 

(d) as

possible to assist the tribes. 

 The division additionally recognized that, while

the department is not required by section 19-1-126(3) to send notice to a tribe by

registered or certified mail with return receipts requested, the department must be

able to demonstrate on the record its efforts to determine whether there is reason

to know that the child is an Indian child. Id. at ¶ 65, 511 P.3d at 761. Ultimately,

the division concluded that, in assessing due diligence, the juvenile courts must

remain mindful that it is a tribe’s prerogative alone to determine who is and who

is not a member, or eligible for membership, in the tribe. Id. at ¶ 66, 511 P.3d at

761; see also 

(b) (2023).

¶20   The division ordered a limited remand so that the Department could apply

the appellate court’s new three-step test. 

 at ¶¶ 82–90, 511 P.3d at 764–65.

¶21   On limited remand, the Department’s caseworker tried to contact Mother

using three different phone numbers, but Mother never returned any of the

caseworker’s calls.    The caseworker also reached out to A-J.A.B.’s maternal

                                              12
grandmother, who informed the caseworker that “the family did not have any

Indian heritage.” People in Int. of A-J.A.B., No. 21CA764, ¶ 9 (Aug. 11, 2022)

(“A-J.A.B. II”). She indicated that no member of the family had been to or lived on

an Indian reservation. The child’s maternal grandmother additionally signed a

declaration of non-Indian heritage. Based on this record, the juvenile court found

that   the   Department     exercised   its   due   diligence   obligations   under

section 19-1-126(3) and concluded “that there was no reason to know that the child

was an Indian child.” 

¶22    Mother again appealed, arguing that the Department did not exercise due

diligence because it did not send notice to or otherwise contact the tribes or the

child’s maternal great-aunt.     The division affirmed, concluding that “the

Department followed the remand instructions and that the record support[ed] the

[juvenile] court’s finding that the Department had exercised due diligence.” Id. at

¶ 10. The division held that the Department satisfied its due diligence obligations

by repeatedly trying to contact Mother and by successfully contacting A-J.A.B.’s

maternal grandmother and obtaining a declaration of non-Indian heritage from

her. Further, the division explained, the Department rightly concluded that its

inquiries on limited remand did not lead to any “other persons, agencies,

organizations, or tribes that might have additional information,” meaning there

were no other parties the Department ought to have contacted to satisfy its due

                                         13
diligence obligation. Id. Accordingly, the division found that “ICWA does not

apply in this case.” Id. at ¶ 12. Mother sought certiorari review from this court,

which we granted.6

                                  II. Analysis

¶23   We begin by explaining the standard of review before turning to the

pertinent principles of statutory interpretation. Next, we examine the relevant

federal and Colorado statutes and review our recent caselaw regarding ICWA and

Colorado’s implementing legislation. Then, we turn to the split between the

published opinion below and another published court of appeals’ decision

regarding how to define due diligence under section 19-1-126(3). After that, we

articulate the steps required for a department to fulfill its due diligence obligations

under section 19-1-126(3).

             A. Standard of Review and Principles of Statutory
                              Construction

¶24   We review questions of statutory interpretation de novo. E.A.M., ¶ 39,

516 P.3d at 934. “This includes ICWA-related construction questions.” Id. But we



6 We granted certiorari to review the following issue:

      1. Whether the division erred in its analysis of C.R.S. § 19-1-126 and
         

 in concluding that the Department had exercised due
         diligence in gathering information to determine whether the child was
         an Indian child when the Department failed to contact Native American
         tribes specifically identified by Mother through which she may have
         Native American heritage.
                                          14
review a juvenile court’s underlying factual findings for clear error. V.K.L., ¶ 20,

512 P.3d at 139.

¶25      When interpreting statutes, we endeavor to effectuate the General

Assembly’s intent. People v. Cali, 

, 

. In doing so,

“we must ‘consider the entire statutory scheme in order to give consistent,

harmonious, and sensible effect to all of its parts.’” E.A.M., ¶ 40, 516 P.3d at 934

(quoting K.C., ¶ 21, 

). We give the statute’s words their plain and

ordinary meaning and avoid interpretations that render words or provisions

superfluous. Lombard v. Colo. Outdoor Educ. Ctr., Inc., 

 (Colo.

2008).

¶26      However, when interpreting statutes concerning Indian law, our “standard

principles of statutory construction do not have their usual force.” E.A.M., ¶ 41,

516 P.3d at 934 (quoting K.C., ¶ 22, 

); accord Montana v. Blackfeet Tribe

of Indians, 

 (1985). Rather, due to “the unique trust relationship

between the United States and tribes, ‘statutes are to be construed liberally in favor

of the Indians, with ambiguous provisions interpreted to their benefit.’” V.K.L.,

¶ 20, 512 P.3d at 139 (quoting Blackfeet Tribe, 

).

                              B. Statutory Overview

¶27      Next, we examine ICWA’s history as well as various federal regulations and

guidelines relevant to this matter.      We then consider Colorado’s legislation


                                          15
implementing ICWA, including section 19-1-126. Against this backdrop, we turn

our attention to the specific issue before us: defining due diligence as that phrase

is used in section 19-1-126(3).

¶28   Congress enacted ICWA on the heels of the federal government’s

“Termination [E]ra” and its attempts to weaken tribal sovereignty. Matthew L.M.

Fletcher, Federal Indian Law § 3.10 (2016). ICWA was a “direct response to the mass

removal of Indian children from their families during the 1950s, 1960s, and 1970s.”

Brackeen, 143 S. Ct. at 1641 (Gorsuch, J., concurring); see also H.R. Rep. No. 95-1386,

at 9 (1978) (“The wholesale separation of Indian children from their families is

perhaps the most tragic and destructive aspect of American Indian Life today.”);

V.K.L., ¶¶ 21-25, 512 P.3d at 139-40.

¶29   When Congress passed ICWA, reports showed that up to 35% of all Indian

children were being removed from their families and sent off-reservation to be

fostered or adopted by non-Indian families. Cohen, supra, § 11.01[2]. As one tribal

leader explained, “Culturally, the chances of Indian survival are significantly

reduced if our children, the only real means for the transmission of the tribal

heritage, are to be raised in non-Indian homes and denied exposure to the ways of

their People.” Hearings on S. 1214 before the Subcomm. on Indian Affairs & Public

Lands of the H. Comm. on Interior & Insular Affairs, 95th Cong., 190, 193 (1978)

(statement of Calvin Isaac, Tribal Chief & Member, Miss. Band of Choctaw

                                          16
Indians & Nat’l Tribal Chairmen’s Ass’n); see also 

. ICWA was

enacted to combat “[t]his ‘wholesale removal of Indian children from their

homes.’” Adoptive Couple v. Baby Girl, 

 (2013) (quoting Miss. Band

of Choctaw Indians v. Holyfield, 

 (1989)).

¶30      ICWA lays out the “minimum Federal standards” for child-custody

hearings that involve Indian children.          

.   Relevant here, this

includes termination of parental-rights proceedings. 

(1)(ii). ICWA

instructs that when certain child-custody proceedings are initiated and the

juvenile court “knows or has reason to know that an Indian child is involved,”

(a), formal notice requirements are triggered, including

notification obligations to the relevant tribe (or tribes) so that they may intervene

in the custody proceedings or have the proceedings transferred to tribal court, see

id.; 

(b), (c); see also K.C., ¶ 25, 

. To fulfill these

obligations, the inquiry and notice provisions require petitioning parties and

juvenile courts to inquire early and often whether a participant knows or has

reason to know that the subject child is an Indian child. See Guidelines for

Implementing the Indian Child Welfare Act, 

-01, at *11 (Dec. 30,

2016).

¶31      Under ICWA, an “Indian child” is defined as: “any unmarried person who

is under age eighteen and is either (a) a member of an Indian tribe or (b) is eligible

                                           17
for membership in an Indian tribe and is the biological child of a member of an

Indian tribe.” 

(4).7 “Eligibility alone, therefore, does not render a

child an ‘Indian child’ under ICWA.” K.C., ¶ 24, 

. So too, Indian

heritage on its own does not meet the statutory definition of “Indian child.”

E.A.M., ¶ 46, 516 P.3d at 935.

¶32   “Notably, ICWA doesn’t delineate tribal membership or eligibility for such

membership.” Id. at ¶ 15, 516 P.3d at 929. Rather, “membership is left to the

province of each individual tribe.” People in Int. of K.R., 

, 

, 338; see also 

. But there is no uniform metric for assessing

tribal membership across the hundreds of federally recognized tribes. See People

in Int. of A.G.-G., 

 (Colo. App. 1995). So, in some instances, “a

court may not possess the ability to discern membership or eligibility for

membership in a particular tribe without a tribal determination.” E.A.M., ¶ 15,

516 P.3d at 929. And courts must be mindful “not [to] substitute [their] own

determination regarding a child’s membership in a Tribe, a child’s eligibility for

membership in a Tribe, or a parent’s membership in a Tribe.” 

(b).




7 ICWA’s definition of an Indian child is one of political affiliation, not a racial

based classification. See Conf. of W. Att’ys Gen., American Indian Law Deskbook
§ 13:7, Westlaw (database updated May 2023); Morton v. Mancari, 

, 553
n.24 (1974).
                                         18
¶33   To provide clearer guidelines for juvenile courts on when ICWA’s notice

provisions are applicable, Congress empowered the Department of the Interior to

promulgate rules pertaining to ICWA. 

. The federal Bureau of

Indian Affairs (“BIA”) has accordingly published rules and issued guidelines for

state courts. See Guidelines for State Courts; Indian Child-Custody Proceedings,

 (Nov. 26, 1979). And in 2002, the General Assembly “integrated

ICWA into the Colorado Children’s Code.” E.A.M., ¶ 13, 516 P.3d at 929; see

Ch. 217, secs. 1, 3, § 19-1-126, 

, 782–85. Notably, though,

“the 1979 Guidelines were not regulations” and were simply that: guidelines.

E.A.M., ¶ 11, 516 P.3d at 928. Thus, they lacked binding legislative effect. Id.

¶34   It was not until 2016, some thirty-eight years after ICWA was first enacted,

that the BIA promulgated federal regulations concerning ICWA. See Indian Child

Welfare Act Proceedings, 

 (June 14, 2016).           “The federal

regulations clarify some provisions in ICWA, including by defining key terms.”

E.A.M., ¶ 11, 516 P.3d at 928. Six months later, the BIA also updated its 1979

Guidelines.   See Guidelines for Implementing the Indian Child Welfare Act,

-01 (Dec. 30, 2016). And while the 2016 Guidelines “are no more

binding than their predecessors,” this court has “embraced” them as an essential

tool in interpreting and applying ICWA’s provisions. E.A.M., ¶ 12, 516 P.3d at 929.




                                         19
¶35   Colorado’s General Assembly enacted Colorado’s ICWA statute in 2002,

2002 Colo. Sess. Laws at 783–85, and amended the statute in 2019 to align with the

BIA’s 2016 Guidelines, Ch. 305, sec. 1, 

, 2791.

Colorado’s ICWA statute mirrors ICWA’s formal notice requirements and

provides, among other things, that when a court “knows or has reason to know

. . . that the child who is the subject of the proceeding is an Indian child,” formal

notice requirements are triggered. § 19-1-126(1)(b). So, as previously noted,

regardless of whether a court knows or has reason to know that a child is an Indian

child, the short-term effect is the same: “the court must treat the child as an Indian

child throughout the proceeding unless and until it is determined on the record

that the child does not meet the definition of an Indian child.” E.A.M., ¶ 25 n.3,

516 P.3d at 931 n.3.

¶36   But when does a court know or have reason to know that a child is an Indian

child? The former is “fairly straightforward.” Id. at ¶ 4, 516 P.3d at 927. “A court

‘knows’ that a child is an Indian child ‘when made aware of the truth of this fact

after a tribe or tribes have verified the child’s membership, or verified the child’s

eligibility for membership through a biological parent’s membership.’” Id. at ¶ 23

n.2, 516 P.3d at 931 n.2 (quoting A-J.A.B. I, ¶ 35, 511 P.3d at 757).

¶37   The answer to the more vexing question of when a court has reason to know

whether a child is an Indian child in dependency and neglect cases is guided by

                                          20
the six factors outlined in the BIA’s 2016 Regulations, which are mirrored in

section 19-1-126(1)(a)(II). The six factors are:

      (1) Any participant in the proceeding, officer of the court involved in
      the proceeding, Indian Tribe, Indian organization, or agency informs
      the court that the child is an Indian child;

      (2) Any participant in the proceeding, officer of the court involved in
      the proceeding, Indian Tribe, Indian organization, or agency informs
      the court that it has discovered information indicating that the child
      is an Indian child;

      (3) The child who is the subject of the proceeding gives the court
      reason to know he or she is an Indian child;

      (4) The court is informed that the domicile or residence of the child,
      the child’s parent, or the child’s Indian custodian is on a reservation
      or in an Alaska Native village;

      (5) The court is informed that the child is or has been a ward of a
      Tribal court; or

      (6) The court is informed that either parent or the child possesses an
      identification card indicating membership in an Indian Tribe.

(c); see § 19-1-126(1)(a)(II) (incorporating the BIA’s six factors into

state law).

¶38   We explained in E.A.M. that “mere assertions of a child’s Indian heritage

(including those that specify a tribe or multiple tribes by name), without more, are

not enough to give a juvenile court reason to know that the child is an Indian

child.” ¶ 56, 516 P.3d at 937. Importantly, however, that is not the end of the

inquiry: “Instead, such assertions trigger the due diligence requirement in

section 19-1-126(3).” Id. at ¶ 6, 516 P.3d at 928. This statutory provision, which
                                           21
was enacted by the General Assembly in 2019, goes beyond the safeguards set

forth in ICWA. So, if the juvenile court neither knows nor has reason to know that

the child is an Indian child, but receives information that the child may be an Indian

child, the court must direct the petitioning party to exercise due diligence in

gathering additional information that would assist the court in determining if

there is a reason to know that the child is an Indian child. § 19-1-126(3).

¶39   Section 19-1-126(3), which imposes this requirement, states that:

      If the court receives information that the child may have Indian
      heritage but does not have sufficient information to determine that
      there is reason to know that the child is an Indian child pursuant to
      subsection (1)(a)(II) of this section, the court shall direct the
      petitioning or filing party to exercise due diligence in gathering
      additional information that would assist the court in determining
      whether there is reason to know that the child is an Indian child.

(Emphasis added.) Another division of the court of appeals recently offered a

competing definition of due diligence under this statute. Compare A-J.A.B. I, ¶ 51,

511 P.3d at 759–60, with People in Int. of Jay.J.L., 

, ¶ 41, 

,

320, abrogated on other grounds by E.A.M., ¶ 56, 516 P.3d at 937. We first consider

these different approaches and then explain what due diligence under

section 19-1-126(3) requires.




                                         22
                C. Competing Definitions of “Due Diligence”

¶40   We begin with a quick recap of the due diligence test crafted by the A-J.A.B. I

division below. Then, we examine the alternative due diligence test articulated by

the division in Jay.J.L.

¶41   Recall that the division below adopted a three-part test to define due

diligence under section 19-1-126(3). See A-J.A.B. I, ¶¶ 60–63, 511 P.3d at 761. First,

a department must “earnestly inquire of any person disclosing possible Indian

heritage to determine the basis of that person’s belief or understanding.” Id. at

¶ 61, 511 P.3d at 761.

¶42   Second, the department must “contact available family members and

available extended family members and clarify what tribal ancestral group, and

federally recognized tribes affiliated with the ancestral group, the parent or child

might be affiliated with.” Id. at ¶ 62, 511 P.3d at 761.

¶43   And third, “from these inquiries, the department should be able to identify

any other persons, agencies, organizations, or tribes that might have additional

information about whether there is ‘reason to know’ the child is an Indian child.”

Id. at ¶ 63, 511 P.3d at 761. The division emphasized that tribal notification would

not be necessary in each case but rather would depend on the specific facts

presented. Specifically, the division wrote that a department

      may choose to contact the tribe or tribes within the identified ancestral
      group or groups to identify whether there is ‘reason to know’ the
                                          23
      parent or child is a member of any such tribe. . . . Such contact may
      be necessary when, for example, there are no other satisfactory
      sources of additional information. If the department makes this
      choice, [departments] should provide as much of the information
      required by 

(d) as possible to assist the tribes in
      determining whether there is ‘reason to know’ the child is an Indian
      child.

Id. at ¶ 64, 511 P.3d at 761.

¶44   The division in Jay.J.L. took a different approach. It first considered the

ordinary meaning of due diligence before turning to other Colorado appellate

authorities to define “due diligence.” ¶ 37, 514 P.3d at 319. The Jay.J.L. division

“agree[d] with the division in A-J.A.B. [I] that the record needs to establish that the

department . . . earnestly endeavored to gather additional information that would

assist the court in determining whether there is reason to know that the child is an

Indian child.” Id. at ¶ 38, 514 P.3d at 319. The Jay.J.L. division also agreed that “to

meet this standard, the department must follow up with any parent who discloses

Indian heritage to determine the basis of the parent’s belief or understanding.” Id.

¶45   However, the Jay.J.L. division disagreed with A-J.A.B. I’s specific

requirement that a department must “contact available family members and

determine whether they have additional information that would help the court

determine whether the child is an Indian child.” Id. at ¶ 39, 514 P.3d at 320. In the

Jay.J.L. division’s view, A-J.A.B. I’s test contradicts section 19-1-126(3) because it

“enumerate[s] specific steps that a party must take to satisfy due diligence.” Id. at

                                          24
¶ 40, 514 P.3d at 320. But, the Jay.J.L. division explained, “[t]here is no objective,

formulaic standard for determining what is, or is not, due diligence.”             Id.

(alteration in original) (quoting Owens v. Tergeson, 

, 

). Moreover, the division observed, due diligence does not necessarily

require the party exercising it to actually succeed in its efforts or exhaust every

possible option in attempting to do so. 

¶46   Given the unique nature of child-custody proceedings and the

inapplicability of a rigid, formulaic standard, the Jay.J.L. division concluded that a

determination of what constitutes due diligence needs to be “flexible and will

necessarily depend on the circumstances of, and the information presented to the

court in, each case.” ¶ 41, 514 P.3d at 320.

¶47   Having surveyed the A-J.A.B. I and Jay.J.L. divisions’ differing approaches,

we now explain the proper inquiry for analyzing due diligence under

section 19-1-126(3).

                           D. Due Diligence Standard

¶48   Like the divisions in A-J.A.B. I and Jay.J.L., we look to the dictionary and to

the ordinary meaning of due diligence before turning to Colorado’s ICWA-

implementing statute and other Colorado appellate authorities to define due

diligence under section 19-1-126(3).




                                         25
¶49      Diligence is defined as “steady, earnest, and energetic effort: devoted and

painstaking work and application to accomplish an undertaking.”           Diligence,

Merriam-Webster Dictionary, https://www.merriam-webster.com/dictionary/

diligence [https://perma.cc/Q8GZ-KPS2]. Black’s Law Dictionary refers to “due

diligence” as “[t]he diligence reasonably expected from, and ordinarily exercised

by, a person who seeks to satisfy a legal requirement or to discharge an

obligation.” Due Diligence, Black’s Law Dictionary (11th ed. 2019).

¶50      Like the divisions, we too conclude that when a department learns that a

child in a dependency and neglect case may be an Indian child, the department

must earnestly endeavor to gather additional information that would assist the

court in determining whether there is reason to know that the child is an Indian

child.

¶51      But what additional information must a department gather to satisfy its due

diligence obligation and to assist the court? Mother argues in her briefs that

because tribes are the best sources of information regarding membership and

eligibility for membership, due diligence necessarily requires formal notice to the

tribes in every case in which a child may be an Indian child. Requiring formal

notice in every such case would, in Mother’s view, provide the best and most

conclusive answer to the question of whether a child is a member of or eligible to

be a member of a tribe. We disagree that this is what due diligence requires.

                                          26
¶52   This is because Mother’s approach to defining due diligence is at odds with

ICWA and Colorado’s broader statutory schemes. Her approach treats every case

in which a child may be an Indian child under section 19-1-126(3) the same for

notice purposes as those cases in which the court has reason to know that a child is

an Indian child, section 19-1-126(1)(a)(II). However, general assertions of Indian

heritage without more do not reach subsection 126(1)(a)(II)’s reason-to-know

threshold. See E.A.M., ¶ 56, 516 P.3d at 937. As a result, Mother’s approach to

defining due diligence essentially collapses this key distinction between

subsections 126(1)(a)(II) and 126(3). This approach also completely disregards our

holding in E.A.M. because it would necessarily require notice in some instances in

which we have held that none is required. See E.A.M., ¶ 27, 516 P.3d at 931.

¶53   Amicus Office of Respondent Parents’ Counsel (“ORPC”) and Mother’s

attorney also assert that tribes are the best source of information about who is an

Indian child, and thus due diligence requires departments in every case in which

a child may be an Indian child to contact the relevant Indian tribe or tribes, absent

extenuating circumstances. We disagree that subsection 126(3) requires contact

with a generally-identified tribe in every case in which a child may be an Indian

child for three reasons.

¶54   First, the General Assembly could have required contact with tribes in

section 19-1-126(3), and it is significant that it did not. Second, to the extent that

                                         27
counsel uses the phrase “contact” with the tribes to mean notice by telephone,

e-mail, or regular U.S. mail—as distinguished from the formal notice required by

ICWA that must be sent by return-receipt requested mail—we are not persuaded

that the method of delivering notice is what distinguishes subsections 126(1)(a)(II)

and 126(3). And third, Mother and ORPCs’ definitions of due diligence contradict

section 19-1-126(3) because they both rigidly prescribe steps that a department

must take in every case to satisfy its due diligence obligation. See Owens, ¶ 45,

 (explaining there is no objective, formulaic standard for

determining what is, or is not, due diligence); Jay.J.L., ¶ 40, 514 P.3d at 320

(explaining how the due diligence test as articulated by the division in A-J.A.B. I is

inconsistent with section 19-1-126(3) because it “enumerate[s] specific steps that a

party must take to satisfy due diligence”).

¶55   But due diligence, as that phrase is used in section 19-1-126(3), cannot be

measured against a predetermined checklist of steps that a department must take

in every case in which a child may be an Indian child. This is because general

claims of Indian heritage can be asserted in a multitude of different ways, some of

which are very specific and some of which don’t go beyond vague assertions of

general tribal membership. Due diligence in this context is a concept that logically

must be flexible enough to allow the juvenile court to examine the thoroughness

of a department’s investigation into a general claim of Indian heritage based on

                                         28
the specific circumstances of the claim before it. As a result, the determination of

whether a department has exercised due diligence will necessarily vary with the

specific circumstances of each case. Cf. V.K.L., ¶ 32, 512 P.3d at 142 (recognizing

that there can be “no one-size-fits-all formula” for defining what constitutes

“active efforts” to assist an Indian family, as such efforts must be tailored to the

specific facts and circumstances of the case).

¶56    This is why we disagree with A-J.A.B. I’s specific requirement that the

department “contact available family members and available extended family

members,” and “from these inquiries . . . identify any other persons, agencies,

organizations, or tribes that might have additional information about whether there

is ‘reason to know’ the child is an Indian child.” A-J.A.B. I, ¶¶ 62–63, 511 P.3d at

761.   To be sure, there will be cases in which due diligence will require a

department to contact many or all available family members to gather additional

information. But just as certainly, there will be other cases in which this type of

contact will not be required for a department to satisfy its due diligence obligation.

¶57    So, to summarize, due diligence, as it is used in section 19-1-126(3), requires

the department to earnestly endeavor to investigate the basis for the parent or

other participant’s assertion that the child may be an Indian child, to contact those

family members or others who are specifically identified as having knowledge

regarding that assertion of general Indian heritage, and to learn whether

                                          29
additional information exists that will help the court determine whether there is a

reason to know that the child is an Indian child. Cf. V.K.L., ¶ 33, 512 P.3d at 143

(instructing courts to consider the totality of the circumstances when reviewing

whether an agency made “active efforts”).

¶58   We emphasize that this flexible standard is not a de minimis or superficial

one. We are mindful that the General Assembly’s adoption of the due diligence

standard in section 19-1-126(3) goes beyond the guardrails set forth in ICWA to

protect the interests of Indian tribes and Indian children. To meet this standard, a

department cannot just go through the motions after a party or participant claims

general Indian heritage. It must ask questions: Why does the parent believe the

family has the heritage asserted? Who is the source of that information? Due

diligence then requires a department to follow up with the source of the

information.8   Those sources may identify additional persons with knowledge

which may, in turn, require additional follow up.        Due diligence does not,

however, necessarily require the party exercising it to succeed in its efforts or

exhaust every possible option in attempting to do so. Whether the department has



8  For instance, if father indicates that he thinks he has Cherokee heritage, the
department should ask father for the basis for that understanding. If father states
that he was told this by his uncle, then the department should earnestly endeavor
to follow up with that uncle to investigate and learn what he knows about the
family’s Cherokee heritage and specifically if father is a member of a Cherokee
tribe.
                                        30
satisfied its due diligence obligation in any case will ultimately be left to the sound

discretion of the juvenile court, which necessarily requires the court to make

credibility determinations regarding the source of the information and the basis

for the source’s knowledge.

¶59   Finally, after obtaining additional information necessary to satisfy due

diligence, the petitioning party must then inform the juvenile court of its efforts

and whether it believes the additional information rises to the level of reason to

know under 

(c) and section 19-1-126(1)(a)(II). Based on that

additional information, the juvenile court must determine (1) whether the

petitioning party satisfied its statutory due diligence requirements and

(2) whether the court now has reason to know that the child is an Indian child.

¶60   We now apply the proper test for satisfying subsection 126(3)’s due

diligence requirement to the case at hand.

                                   E. Application

¶61   Prior to the first appeal, the Department appears to have engaged in little to

no effort to gather additional information regarding the basis for Mother’s

understanding that she may have Cherokee and Lakota Sioux heritage. It was not

the Department, but Mother’s attorney who contacted the child’s maternal

grandmother and advised the court that the maternal grandmother said that the

child’s maternal great-aunt would be the best source for information about the


                                          31
family’s Indian heritage. The Department did not then follow up with either of

them. As the division concluded in A-J.A.B. I, the Department’s efforts before the

first appeal fell far short of due diligence.

¶62   Following the limited remand, the Department attempted to follow up with

Mother.    Its caseworker tried contacting Mother using three different phone

numbers, all to no avail. The Department also reached out to the child’s maternal

grandmother. She reported that there was no Native American heritage in the

immediate family or in their family history that “they” were aware of, that no one

in the family was a member of a tribe, and that no member of the family had been

to or ever lived on a reservation. The child’s maternal grandmother also signed a

declaration of non-Indian heritage.

¶63   Mother argues that the Department’s efforts fell short of due diligence

because the Department never contacted A-J.A.B.’s maternal great-aunt, the

person whom the child’s maternal grandmother identified as the best source of

information regarding the child’s Indian heritage. Certainly, the better practice

here would have been for the Department to attempt to contact A-J.A.B.’s maternal

great-aunt, given that she was specifically named as the best source of information.

But under the specific facts of this case, the Department did not need to do so to

satisfy due diligence.




                                           32
¶64   True, it does appear that the child’s maternal grandmother may have

changed her story. But these types of credibility determinations are precisely the

types of decisions that juvenile courts are called upon to make every day. Here,

the juvenile court may have determined that the maternal grandmother’s second

statement, which was more formal, more detailed, and made later in time, was

more reliable than her original statement. Or the court may have construed the

maternal grandmother’s later statement, given its phrasing, as speaking to the

family’s knowledge—including that of A-J.A.B.’s maternal great-aunt. Of course,

the juvenile court alternatively could have looked at this conflict and concluded

that the Department had not exercised due diligence because it had not tried to

contact the child’s maternal great-aunt. In any event, we cannot conclude on this

record that the division erred in concluding that the Department satisfied its due

diligence obligation under section 19-1-126(3). And even if the Department erred,

any error is harmless because we now know, definitively, that the child is not an

Indian child.

¶65   Recall that Mother has never claimed tribal membership. To the contrary,

Mother acknowledged that she probably would not qualify for tribal membership.

Mother also never claimed that A-J.A.B. was eligible for membership in an Indian

tribe. And if Mother was not a member of an Indian tribe (and here, Father had

attested that he was not a member of an Indian tribe), then there is no way that the

                                        33
child “is the biological child of a member of an Indian tribe.” 

(4).

Put another way, here there was no reason to believe A-J.A.B. is an Indian child.

                               III. Conclusion

¶66   Applying the standard set forth in section II.D. above, we conclude that the

division did not err in determining that the Department satisfied its due diligence

obligation under section 19-1-126(3). Accordingly, we affirm the division, albeit

on different grounds.




                                        34