Unless otherwise specified in the action granting a conditional use permit, said conditional use permit which has not been utilized within 12 months from the effective date shall become null and void. Also the abandonment or nonuse of a conditional use permit for a period of 12 consecutive months shall terminate said conditional use permit and any privileges granted thereunder shall become null and void. However, an extension of time may be granted by Commission or Council action.
('64 Code, § 72.11)