The Arizona Supreme Court barred a ballot proposal seeking to raise income taxes on the wealthy to fund schools from appearing on the November ballot.
In an order Wednesday, Chief Justice Scott Bales said a majority of the court found that the measure’s description of the change in tax rates creates a danger of confusion or unfairness.
The order reverses a lower-court ruling earlier this month that rejected the challenge to the measure.
Opponents said the tax hike would have harmed the state’s economy, while supporters say it would have raised an estimated $690 million for schools.
The proposal sought to raise the income tax rate to 8 percent for individuals earning more than $250,000 and households earning more than $500,000 for the portion of their income above those cutoffs.