The Secretary of the Interior shall prepare a roll of all persons who meet the following requirements for eligibility:
(a)
They were alive on October 24, 1967, and
(b)
they are descendants of members of the Upper and Lower Chehalis Tribes as they existed in 1855. Applications for enrollment must be filed with the Superintendent, Western Washington Agency, Everett, Washington, on forms prescribed for that purpose. The determination of the Secretary regarding the utilization of available rolls or records and the eligibility for enrollment of an applicant shall be final.