Upon receipt of written notice or order from the Health Officer, the owner or occupant of any business building specified therein shall take immediate measures to comply with any section or sections in violation of this chapter for rat-proofing such building, and upon receipt of like notice or order the owner of any nonbusiness building shall take immediate measures to comply with any section or sections in violation of this chapter. Unless such rat-proofing and rat-stoppage is completed by the owner, lessee, occupant, agent or custodian in the time specified in the written notice or order, in no event to be less than seven days, or within the time to which a written extension may have been granted by the Health Officer, then such owner, lessee, occupant, agent or custodian shall be subject to the penalty provided in Section 1353.99. (Ord. 52-1964. Passed 6-15-64.)