43 CFR §30.123

1. (a)The judge in a probate proceeding will determine:
   1. (1)If relevant, the status of eligible heirs or devisees as Indians;
   2. (2)If relevant, the nationality or citizenship of eligible heirs or devisees; and
   3. (3)Whether any of the Indian heirs or devisees with U.S. citizenship are individuals for whom the supervision and trusteeship of the United States has been terminated.
2. (b)A judge may make determinations under this section in a current probate proceeding or in a completed probate case after a reopening without regard to a time limit.