The Building Inspector may issue a Temporary Certificate of Occupancy, which shall be valid only for the period of time stated in the certificate, for a specified portion or portions of a building, which may safely be occupied prior to final completion of the entire building and/or site. Conditions that are attached to the temporary Certificate of Occupancy must be completed prior to the expiration of the certificate. When such conditions have not been completed prior to the expiration date of the conditional certificate, the Certificate of Occupancy shall immediately expire. Upon receipt of a written application to the Building Inspector stating satisfactory reasons for the failure to complete work within the given time period, the Inspector may renew the certificate for a specified period of time, not to exceed ninety (90) days.