On or before July 1 of each year, the director of finance shall designate the banking institutions in the county where taxes may be paid, and notice of such designations shall be attached to or printed on the back of all tax bills rendered by the county. Each such banking institution may be paid up to five cents ($0.05) for each tax bill under which payment is received by it. On the first Monday of each month, each such banking institution shall report all collections received during the preceding month to the director of finance in such form as he shall prescribe, and all such collections shall be held or transmitted by the banking institution as the director of finance shall direct. (1986 L.M.C., ch. 37, § 2.)