1.   Each travel trailer park shall be provided with at least one service building separately equipped with flush-type toilet fixtures and other sanitary facilities.
   2.   Service buildings shall:
      a.   Be located 25 feet or more from any travel trailer space;
      b.   Be of permanent construction and be adequately lighted;
      c.   Be of moisture-resistant material, to permit frequent washing and cleansing;
      d.   Have adequate heating facilities to maintain a temperature of 70°F during cold weather, and to supply adequate hot water during time of peak demands; and
      e.   Have all rooms well-ventilated, with all openings effectively screened.
   3.   All service buildings and the grounds of the park shall be maintained in a clean condition and kept free of any condition that will menace the health of any occupant or the public, or constitute a menace.