(a) The building official, on the vacation of any building in accordance with the provisions of § 66503 or § 66504, shall post or cause to be posted at each entrance to the building, a sign stating: “”This building is unsafe and its use or occupancy is prohibited by the Director of Public Works. Any person entering this building without permission of the Director of Public Works shall be subject to fine or imprisonment or both.””

(b) Such sign shall remain posted until the required repairs are made or demolition is completed.

(c) Any person entering the building, except for the purpose of making the required repairs or effecting demolition, or any person removing any sign posted by the building official shall be liable to the penalties provided for in this Chapter.

SOURCE: GC § 31052.