25 U.S.C. § 1292

The Secretary of the Interior shall prepare a roll of all persons who meet the following requirements:

(a) they were born on or prior to and were living on October 3, 1972; and

(b) they are citizens of the United States; and

(c)(1) their name or the name of a lineal ancestor appears on the Delaware Indian per capita payroll approved by the Secretary on April 20, 1906, or

(2) their name or the name of a lineal ancestor is on or is eligible to be on the constructed base census roll as of 1940 of the Absentee Delaware Tribe of Western Oklahoma, approved by the Secretary.