The Arizona Constitution requires valid signatures from 15% of qualified electors to place an initiative proposing a constitutional amendment on the ballot and valid signatures from 10% of qualified electors to place an initiative proposing a statutory amendment on the ballot. Ariz. Const.
Any amendment or amendments to this constitution may be proposed in either house of the legislature, or by initiative petition signed by a number of qualified electors equal to fifteen percent of the total number of votes for all candidates for governor at the last preceding general election.
An amendment may be proposed by a two-thirds vote of both Houses of Congress, or, if two-thirds of the States request one, by a convention called for that purpose. The amendment must then be ratified by three-fourths of the State legislatures, or three-fourths of conventions called in each State for ratification.
A constitutional amendment can be initiated by the Legislature if it passes both houses by a two-thirds vote. A constitutional amendment does not need the Governor's signature, but becomes part of the constitution only if the electorate approves it at the next general election.