A simple majority vote is required during one legislative session for the Arizona State Legislature to place a constitutional amendment on the ballot. Convening in Phoenix, Arizona, students proposed, debated and adopted amendments to the United States Constitution in a simulated three-day Convention.Arizona voters have approved a constitutional amendment guaranteeing abortion access up to fetal viability, typically after 21 weeks. Arizona voters on Tuesday approved an amendment enshrining abortion rights in the state constitution, NBC News projects. 1912. Referendum: The state of Arizona and each municipal corporation within the state of Arizona shall have the right to engage in industrial pursuits. Are amendments required? Arizona voters have approved a constitutional amendment guaranteeing abortion access up to fetal viability, typically after 21 weeks. Text Amendments (TAs) are the process used when changes are proposed in the Phoenix Zoning Ordinance. Opponents of the constitutional amendment are preparing a defense. Applications for amendment shall be made in the office of the City Planning and Development Department on a form provided therefor. 3.