Section 130Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 130

Provincial central file of registered voters. - There shall be a provincial central file of registered voters containing the duplicate copies of all approved voter's affidavits in each city and municipality in the province which shall be under the custody and supervision of the provincial election supervisor. The applications shall be compiled alphabetically by precincts so as to make the file an exact replica of the book of voters in the possession of the election registrar.

Should the book of voters in the custody of the election registrar be lost or destroyed at a time so close to the election day that there is no time to reconstitute the same, the corresponding book of voters in the provincial file shall be used during the voting.