By The Associated Press

A judge has scheduled a July 18 hearing on a lawsuit challenging a state official's decision to keep a proposed sales tax increase off Arizona's November ballot.

Supporters of the Quality Education and Jobs Act are trying to overturn Secretary of State Ken Bennett's decision. He said a paperwork flaw meant that the initiative campaign didn't submit enough valid signatures.

The supporters contend that the measure should go on the ballot because an electronic version had the correct text. That's even though a printed version omitted some material.

The measure would increase the state sales tax by one cent. It would take effect in 2013 when a temporary one-cent sales tax increase expires.

The measure is being pushed by the Arizona Education Parent Network, which last week said it turned in more than 290,000 signatures on petitions. The initiative needed about 170,000 to qualify for the ballot.

Republican political leaders in the state have said they are opposed to the measure.

The case is before Judge Robert Oberbillig of Maricopa County Superior Court.