When an arrest without a warrant in a summary case is authorized by law, a police officer who exhibits some sign of authority may institute proceedings by such an arrest.
234 Pa. Code ยง 440
Committee Explanatory Reports:
Final Report explaining the March 1, 2000 reorganization and renumbering of the rules published with the Court’s Order at 30 Pa.B. 1478 (March 18, 2000) .