A full time driver must not drive a taxicab more than 12 hours during any 24-hour period. A part-time driver must not drive a taxicab more than 4 hours during any 24-hour period in which the driver is otherwise employed for 8 or more hours. (2004 L.M.C., ch. 27, § 1; 2015 L.M.C., ch. 39, § 1.)