A trailer may be used on a temporary basis when the same is designed as a temporary construction office by the contractor constructing a dwelling on the lot and such use may be continued until a certificate of occupancy is issued. Where a trailer is used for such purpose for the construction of more than one home in a subdivision, it may be used until the completion of a model home. A trailer or mobile home may also be used under the provisions set forth in § 99-3 of the Code of the Borough of Oakland whenever a home in the Borough of Oakland shall be partially destroyed by fire, flood or other disaster to the extent that said home is not habitable for a period of time until certain necessary repairs are made thereto, and the owners of said property who were residing therein at the time of such disaster intend to make immediate repairs to the same and so advise the Building Subcode Official and Borough Clerk by letter and the Building Subcode Official is authorized to issue a temporary certificate of occupancy to said owners for a period not in excess of four months for the erection of a mobile home or trailer on said property at a location to be approved by the Building Subcode Official in conjunction with the Board of Health so that the location is not in any way detrimental to adjoining properties nor obstructs the street or sidewalk or other necessary safety precautions, provided that said mobile home or trailer complies in all respects with the requirements of the Board of Health with respect to the connection of septic systems and other utilities required for habitation therein. During such period of time as such temporary certificate of occupancy shall be issued and remain in effect, the owners of said property residing in said mobile home or trailer shall not be considered to be in violation of this chapter or Section 99-3 of the Code of the Borough of Oakland.