Every site development review granted in accordance with the provisions of this title which were in effect prior to March 1, 1968, shall be valid and may be utilized in accordance with its terms and conditions provided that any such prior site development review may be rescinded by the planning director following ten days’  notice to the permittee and a hearing pursuant to Section 17.54.650 unless it shall have been utilized within one year of the effective date of the order granting subject site development review. (Prior gen. code § 8-60.8A)