And a long excerpt:
Contrary to the Department’s assertion and the apparent corresponding view of the District Court, the “reason to know” standard does not necessarily require an evidentiary showing, and certainly not by the parents, that a child or parent may be eligible for tribal membership. See 25 U.S.C. § 1912(a); 25 C.F.R. §§ 23.107-08. Nor does ICWA require that an assertion of potential tribal eligibility be certain. Gerardo, 14 Cal. Rptr. 3d at 802; Kahlen, 285 Cal. Rptr. at 511. See also 25 C.F.R. §§ 23.107(a), (c), -108(a). Any more stringent construction as suggested by the State would defeat ICWA’s manifest purpose and command. Certainly, a “reason to know” is a low standard, but not an unlimited one. In re Jeremiah G., 92 Cal. Rptr. 3d 203, 207-08 (Cal. App. 2009); In re Z.H., 740 N.W.2d 648, 653-54 (Iowa App. 2007). A “reason to know” requires something more than a bare, vague, or equivocal assertion of possible Indian ancestry without reference to any identified Indian ancestors with a reasonably suspected tribal connection. See Jeremiah G., 92 Cal. Rptr. 3d at 207-08; Z.H., 740 N.W.2d at 653-54. Pursuant to 25 C.F.R. § 23.107(c)(1), Mother’s asserted belief that she may be eligible for enrollment in the Crow Tribe was minimally sufficient to constitute a reason to know that the children were Indian children under the circumstances of this case.
¶22 We are further troubled by the Department’s apparent view that it has no affirmative duty to make further inquiry or provide tribal notice and inquiry when parents are not cooperative. Lack of parental cooperation is immaterial, is not a basis for equitable waiver or estoppel, and does not otherwise relieve state agencies and courts of the duty to comply with ICWA requirements. Kahlen 285 Cal. Rptr. at 512. ICWA vests Indian children and related Indian tribes with a federal right, independent of but on par with the right of Indian and related Indian tribes with a federal right, independent of but on par with the right of Indian parents, to specified tribal notice and eligibility determinations regardless of the conduct or disregard of the parents. Miss. Band of Choctaw Indians, 490 U.S. at 49-53, 109 S. Ct. at 1609-11; Kahlen, 285 Cal. Rptr. at 512. The practical difficulty or inability of a state agency to identify the correct tribe or substantiate an assertion of requisite Indian ancestry does not relieve the agency of its duty to comply with ICWA requirements. See Kahlen, 285 Cal. Rptr. at 512.