On each and every trailer unit in an auto trailer court there shall be a connection to a camp sewer arranged so that the sanitary fixtures in any auto trailer may be readily connected thereto. Immediately after being placed on a trailer unit, every auto trailer shall have all its sanitary fixtures connected to the sewer or sealed so that they cannot be used. Every such connection shall be by means of rigid pipe. Hose connections are not permissible.
('71 Code, § 1181.17) Penalty, see § 101.99