It added Article 30 of the Arizona Constitution, which says: "Only a union of one man and one woman shall be valid or recognized as a marriage in this state.

Supporters said that Proposition 102 was necessary to prevent judges changing the legal definition of marriage, as was done in Massachusetts, California, Connecticut and Iowa.

Presiding State Senator Jack Harper defeated a filibuster on June 27, 2008 to place the proposed Constitutional Amendment on the ballot.

[11] Despite the fact that Harper admitted to cutting off the microphones intentionally,[12] a Senate ethics committee consisting of three Republicans and two Democrats voted 3–2, along strict party lines, to dismiss the charges.

Article XXX, Constitution of Arizona, is proposed to be added as follows if approved by the voters and on proclamation of the Governor: