Constitutional amendments, bond measures, and bills including an appropriation or an urgency clause require a two-thirds vote (27 "yes" votes in the. Charter Amendment Initiative Petition - Allows proponents to submit Charter proposals and amendments to the voters of the City of Los Angeles.Article V: The Congress, whenever two thirds of both houses shall deem it necessary, shall propose amendments to this Constitution. The legal requirements for each petition type are contained in the. Notice of special membership meetings shall be given in the same manner at least ten (10) calendar days in advance. Some recent amendments have included a change to California's Term Limits law through the passage of Proposition 28 (2012), the California Legislature. Joint resolutions, with the exception of proposed amendments to the Constitution, become law in the same manner as bills. Some require that amendments secure the backing of a majority of legislators, whereas others require supermajority legislative support.