25 CFR § 23.115
How are petitions for transfer of a proceeding made?
February 24, 2021
(a) Either parent, the Indian custodian, or the Indian child's Tribe may request, at any time, orally on the record or in writing, that the State court transfer a foster-care or termination-of-parental-rights proceeding to the jurisdiction of the child's Tribe.
(b) The right to request a transfer is available at any stage in each foster-care or termination-of-parental-rights proceeding.