A nonresidential temporary structure, designed as a sales office, may be used in a residential development, including a PUD, exclusively for the purpose of selling new dwelling units within said residential development. The temporary structure may be used only during the construction of a model home/sales office and shall be removed no later than seven days after the issuance of any occupancy certificate for said model homes. In no case may a temporary sales office be used for more than a one-year period. The temporary office shall be the sole occupancy of, and located entirely within the buildable area of, a single lot, shall provide the off-street parking required by Article XII and shall meet all requirements of the Building Code. Unless exempted by the Building Code, the temporary structure shall be connected to public water and sanitary sewer lines, where available, in which case a connection permit shall be obtained from the Township Utilities Department. If public water and sanitary lines are not available to the lot, the temporary structure shall be connected to a well and a septic or holding tank, in which case the applicant shall obtain a permit therefor from the Washtenaw County Health Department. Said temporary structure may not be occupied until an occupancy certificate has been issued. A temporary sales office permitted under this subsection shall not be subject to the provisions of Subsections C through E, following.