(a) It shall be the duty of the Director to fix the number of taxicabs permitted to occupy each stand and to limit the number of taxicabs permitted to occupy each stand and to limit the number of vehicles that any taxicab operator may have parked at any stand at any time.
(b) Only taxicabs in such number designated by the Director shall remain at the stand while waiting for employment. All such taxicabs shall be in a single file pointed in accordance with the traffic regulations.
(c) No taxicab standing at the head of any such line shall refuse to carry any orderly person applying for a taxicab who agrees to pay the proper rate of fare, but this should not prevent any person from selecting any taxicab he may desire, whether it is at the head of the line or not. As the taxicabs leave the line with passengers, those behind shall move up and any taxicab seeking a space on the stand shall approach the same only from the rear of the stand and shall stop as near as possible to the last cab already in line.
(d) No taxicab shall stand at any place on the streets of the City for the purpose of soliciting business, except upon public stands as established and fixed by the Director. No person shall solicit for taxicabs except the driver of a taxicab while sitting upon the driver's seat of his vehicle. The driver shall remain in the driver's seat of his vehicle except when assisting passengers in or out of such vehicle.