Manufacturers or agents of portable or demountable cabanas or other prefabricated structures shall, prior to the erection or construction of such structures in any mobile home park, submit three sets of detailed plans and specifications of such structures and obtain written approval thereof from the building inspector. The building inspector shall transmit one set of such approved plans to the Snohomish health district officer and one set to the city planning director. (Prior code § 17.36.080.)