28.15 (10) Riding on Bicycles and Transport of Bicycles except in Compliance with Administrative Rules: The transport of bicycles on District Vehicles is permitted in accordance with administrative rules as may be promulgated by the General Manager provided that:
(a) No person shall bring aboard or possess a bicycle on a District Vehicle in violation of the District administrative rules; and
(b) No person shall ride a bicycle upon a District Vehicle or District Station, except peace officers and authorized District personnel.