Temporary permit uses permitted in R-1, R-2, R-2A, R-3, R-3A, and R-6A Districts. Upon application to and issuance by the Zoning Officer of a permit therefor, the following uses may be operated as temporary uses within R-1, R-2, R-2A, R-3, R-3A, and R-6A Districts:
(a) Temporary office, both incidental and necessary for the sale or rental of real property. Each permit shall specify the location of the office and the area of permitted operation. Each such permit shall be valid for a period of not more than one year and shall not be renewed for more than five successive periods.