(A) Any person, firm, corporation, governmental agency, department or instrumentality having possession or control of any of the facilities, plants or utility properties enumerated in § 9.24.030 may post, at each entrance to any structure devoted to any use so enumerated, at each entrance to any fenced or enclosed area devoted to any such use, and at intervals of not more than 300 feet around any area devoted to such use, substantial signs not less than one square foot in area, displaying prominently in addition to such other information as may be deemed desirable, the words, “Trespassing, Loitering Forbidden by Law,” in legible letters not less than two inches in height; provided, however, that any public waiting room, dining room, office or other portion of any such structure or premises to which general public access is required in the normal use and operation thereof or where materials are delivered to or received by the public, shall not be so posted.
(B) The posted boundary of any area shall be a line running from sign to sign, and such line need not conform to the legal boundary or legal description of any lot, parcel or acreage of land.
(`83 Code, § 9.24.020)