Unit plots occupied by independent trailers that have a minimum of one flush water closet, one tub or shower, and one sink or lavatory integral within the unit and connected to the public sewer through an approved sewer connection or otherwise to an adequate septic tank constructed in accordance with the requirements of the department of code compliance and provided with an ample and adequate supply of water of safe, potable quality approved by the health officer, and when such unit plot is set aside as provided in Section 47-5 for exclusive use of such trailer, the unit plot may be disregarded in the counting of the unit plots for determining required sanitary facilities for the purposes of this section. (Ord. Nos. 5424; 22026; 27697)