25 C.F.R. § 700.51 Custodial parent.
Title 25 - Indians
A custodial parent is a person who has the immediate personal care, charge, and control of a minor child who resides in his/her household, or a person who fills the parental role but who is not necessarily blood-related.
Title 25: Indians
PART 700—COMMISSION OPERATIONS AND RELOCATION PROCEDURES
Subpart A—General Policies and Instructions
Definitions
§ 700.51 Custodial parent.