Local Government Code of 1991
Section 467. Composition.
(a) The sangguniang panlalawigan, the legislative body of the province, shall be composed of the provincial vice-governor as presiding officer, the regular sanggunian members, the president of the provincial chapter of the liga ng mga barangay, the president of the panlalawigang pederasyon ng mga sangguniang kabataan, the president of the provincial federation of sanggunian members of municipalities and component cities and the sectoral representatives, as members.
(b) In addition thereto, there shall be three (3) sectoral representatives: one (1) from the women; and as shall be determined by the sanggunian concerned within ninety (90) days prior to the holding of the local elections, one (1) from the agricultural or industrial workers; and one (1) from other sectors including the urban poor, indigenous cultural communities, or disabled persons.
(c) The regular members of the sangguniang panlalawigan and the sectoral representatives shall be elected in the manner as may be provided for by law.