In the absence of a completed tribal roll prepared pursuant to subsection (c) of this section and solely for the purposes of the general council meeting and the election provided for in subsection (a) of this section, all living persons on the final roll of the tribe published under section
893 of this title, and all descendants, who are at least eighteen years of age and who possess at least one-quarter degree of Menominee Indian blood, of persons on such roll shall be entitled to attend, participate, and vote at such general council meeting and such election. Verification of descendancy, age, and blood quantum shall be made upon oath before the Secretary or his authorized representative and his determination thereon shall be conclusive and final. The Secretary shall assure that adequate notice of such meeting and election shall be provided eligible voters.