More public sector unions have joined a lawsuit over pay freezes instituted by Gov. Chris Christie. The New Jersey Communications Workers of America, New Jersey Superior Officers Association, Fraternal Order of Police Local 174, and the Law Enforcement Unit were granted the ability to intervene in the lawsuit. The Police Benevolent Association Local 105 and the New Jersey Law Enforcement Supervisors had filed suit last month after step increases were frozen when their contracts expired at the end of June.