Incorrect - the correct answer is (c) contact the Secretary of the Interior and proceed as if ICWA applies until otherwise determined
25 U.S.C. § 1912 . Pending court proceedings
(a) Notice; time for commencement of proceedings; additional time for preparation
. . . If the identity or location of the parent or Indian custodian and the tribe cannot be determined, such notice shall be given to the Secretary in like manner, who shall have fifteen days after receipt to provide the requisite notice to the parent or Indian custodian and the tribe. . .
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