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.
The legislature shall not have the power to amend an initiative measure approved by a majority of the votes cast thereon, or to amend a referendum measure decided by a majority of the votes cast thereon, unless the amending legislation furthers the purposes of such measure and at least three-fourths of the members of ...
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.