The name, address, telephone number, and license number of the licensee, and the words "For Sewage Only" shall be permanently and legibly marked in four (4) inch high letters on both sides and the rear of each vehicle used for cleaning sewage disposal systems. Every vehicle used for cleaning sewage receptacles and transporting sewage shall be equipped with a watertight tank or body and be maintained in a clean and sanitary condition. Sewage shall not be transported in an open vehicle unless within approved portable receptacles. All pumps, linkages, and hose lines shall be maintained so as to prevent leakage. Approval shall be obtained from the Health Officer for every disposal site at which the person plans to discharge the waste material collected.