MADISON, WI (WTAQ) - The state elections’ panel has agreed not to accept challenges to recall signatures except from its own staff, petition circulators, and the targets of the recall drives. The Government Accountability Board decided Tuesday morning to reject challenges from a pair of Tea Party groups, which are reviewing the estimated 1.9 million recall signatures to look for false signers and duplicates. Board director Kevin Kennedy said yesterday there’s never been a process in place for the board to accept challenges to recall signatures from outside groups or individuals. And an attorney for the petitioners, Jeremy Levinson, says it would be “ridiculous” to let Tea Party groups be part of the process. But a leader for one of those groups, Larry Gamble of the Wisconsin Grand-Sons of Liberty, said he’s not ruling out a legal challenge to today’s board decision. Four GOP senators who’ve been targeted are looking for false and duplicate signatures in the petitions against them – and they until Thursday to ask that improper signatures be deleted. Governor Scott Walker’s campaign has until February 27th to file its challenges, and Lieutenant Governor Rebecca Kleefisch has until March fifth to do the same. The Board has until March 19th to verify all the petitions.