(the "Local Autonomy Act") on June 19, 1959, not only granted greater autonomy to local governments, but also expanded the composition of the Provincial Board by creating a new elective office, the vice-governorship, as well as providing for provinces of the first, second and third income class to have one additional elected board member. However, the Board still had limited real legislative powers, as the provincial government was merely serving as an extension of national government. Republic Act No. 5185 was enacted in 1967 with the intention of decentralizing authority and further empowering local governments to address the needs of their constituents more effectively. By virtue of Presidential Decree No. 826 issued by President Ferdinand Marcos on November 14, 1975 all existing governing boards and councils in each province, city and municipality were renamed Sangguniang Bayan. The province-level Sangguniang Bayan (later given the name Sangguniang Panlalawigan, commonly abbreviated to SP) consisted of all the incumbent provincial board members (including the governor and vice-governor), plus a representative from each municipality within the province, and the provincial president of the Katipunan ng Mga Kabataang Barangay or Association of Barangay Youth. Batas Pambansa Blg. 51, enacted in 1979, standardized the composition of all provincial legislatures by reducing the membership of the Sangguniang Panlalawigan. All provinces were entitled to 6 elective SP members, unless they had more than one million residents (8 members) or less than 100,000 residents (4 members). Direct municipal representation was eliminated, and in its place was indirect "grassroots" representation through the president of the provincial association of barangay chairmen who was appointed by the President, who also happened to be the Prime Minister. Other members of the new Sanggunian were the governor and the vice governor, both elected by popular vote, and the president of the provincial federation of the Kabataang Barangay, appointed by the President/Prime Minister. The powers and duties of the Sangguniang Panlalawigan was codified under Batas Pambansa Blg. 337, also known as the Local Government Code of 1983. The governor served as an ex officio member, who did not vote except only to break a tie, but had the power to veto items within, or entire, Sanggunian ordinances and resolutions. However the veto can be overridden by a two-thirds vote of all voting SP members. The Sangguniang Panlalawigan was retained as the legislative branch of all provincial governments under the 1987 Constitution and the Local Government Code