The state Supreme Court will hear arguments during its September session on at least 10 challenges to the latest attempt to redraw Pennsylvania's legislative district boundaries.
The court issued the order Tuesday, a day after the deadline to appeal the Legislative Reappointment Commission's plan that was approved last month.
Challengers include the Senate's 20 Democrats, a few House Democrats, Montgomery and Cumberland county commissioners, the mayors of Phoenixville and West Chester and more than three dozen other people.
Redrawing legislative districts is required every decade to account for population shifts and is highly partisan because of the ability to draw maps that favor one political party.
The Supreme Court struck down the Republican-controlled commission's first plan in January, saying it unnecessarily split some municipalities and drew some districts into shapes that weren't properly compact.
Decision 2012 Pennsylvania state legislative primary and general elections reverted to 2001 boundaries. Once a new map makes it through the challenge process those boundaries would be in effect for elections in 2014.