Currently there is no fight, TWU Fleet language allows the choice : Artice 11 "...In addition to the above duties, performs the following duties as assigned: deicing of aircraft; cleaning of aircraft windshields; pushing out/towing of aircraft and related guideman functions; connecting/removing ground power and ground start units."
AMT CBA Article 11:"In addition to the above duties, may perform the following other duties as assigned such as but not limited to: requesting parts, cleaning work area, performing FOD walks, cleaning of aircraft windshields; connecting/removing ground power and ground start units; pushing out/towing of aircraft, and related guideman functions.