The ruling was a victory for the state’s GOP lawmakers and Corbett, who signed the bill into law in March after it passed the legislature without a single Democratic vote. The lawmakers have defended the measure as a means of preventing voter fraud and the principle of one-person, one-vote. The law’s detractors charge that it is unneeded and will lead to a large number of elderly and minorities being unable to vote, as they are the groups most likely to not possess one of the accepted forms of ID.

The court has seven members, all of them elected; however, Republican Joan Orie Melvin is currently suspended, pending the outcome of an investigation on criminal charges relating to her alleged use of state resources for campaign purposes. In the event of a 3-3 tie, the lower court’s decision would stand and the law would remain in effect for the election.