No operator of any vehicle shall stop, stand or park said vehicle for any period of time longer than is necessary for the loading and unloading of passengers and not to exceed three minutes at any place between the limit markers or signs placed within the projected real property boundaries of any undertaking establishment, private residence, or any public or private place at any time during or within forty (40) minutes prior to the beginning of any funeral by or has received permission from the director or other person in charge of such funeral or funeral service to park such vehicle in such place; provided, that such director or person in charge shall have placed and maintained prior to and during the time limit specified herein, two approved portable signs one at each extremity of such place, upon the sidewalks or pavement area and within two feet of the curb. (Prior code § 3011(l))