Separate equipment replacement reserves and interest in the fund shall be maintained by department/fund. If in the opinion of the fleet manager, a piece of equipment should be replaced, he shall replace such equipment from the department/ fund’s reserves; PROVIDED, That during any current year expenditures from the reserve by any department/fund shall not reduce the department’s reserve balance to a level less than the minimum requirement which shall be defined as five percent of each department/fund’s original cost of equipment not including depreciation reserves as of January 1 of each year. (Added by Ord. 86-125 § 4, Nov. 6, 1986).