All applications for renewal of leases must be filed with the Mayor or his authorized agent on or before 60 days prior to the expiration of the current lease. City Code, 1966, art. 16, §2(n) 1976/83, art. 16, §2(k) Ord. 56-421 Ord. 66-743 Ord. 81-426 Ord. 75-783 Ord. 83-1074