This document discusses the authority of Sanggunian (local legislative councils) to issue subpoenas and conduct sessions. It notes that Sanggunian only have compulsory subpoena powers when exercising quasi-judicial functions, not legislative powers. It defines different types of sessions including regular, special, and emergency sessions, and outlines procedural requirements. It also discusses the duties and limitations of presiding officers, rules regarding quorum, types of measures like ordinances and resolutions, and the local legislative process including the introduction and approval of measures and mayoral veto powers.