Erie County cannot hire part-time workers in place of full-time workers. An arbitrator from the state's Public Employees Relations Board ruled in favor of the Civilian Service Employees Association Local 815. The union filed an improper practice charge last year after County Executive Chris Collins hired about 150 regular part time workers. The arbitrator ruled that the county violated the state's Taylor Law when it failed to negotiate with the union before hiring part time workers rather than full-time employees. Collins said the county will appeal the decision. He said the union's contract allows for regular part time positions.