May 1, 1980 and December 31, 1980 inclusive, there shall also be paid a registration renewal fee of three dollars. 2. For a rental unit which first becomes subject to this chapter between May 1, 1980 and December 31, 1980 inclusive, there shall be an initial registration fee of three dollars; and 3. For any rental unit for which a landlord accepts or demands rent on or after January 1, 1981, there shall be a registration or registration renewal fee of four dollars. 4. For any rental unit for which a landlord accepts or demands rent between January 1, 1982 and December 31, 1982 inclusive, there shall be a registration or registration renewal fee of seven dollars. (Amended by Ord. No. 156,597, Eff. 5/20/82, Oper. 5/15/82.) 5. For any rental unit for which a registration or annual registration renewal statement is required, a registration or annual registration renewal fee shall be paid. This fee shall be due and payable on the first day of January of each year, and shall be deemed delinquent if not paid on or before the last day of the following month. The amount of this fee shall be thirty-eight dollars and seventy-five cents ($38.75). (Amended by Ord. No. 186,448, Eff. 12/30/19.) C. The landlord shall maintain records setting forth the maximum rent for each rental unit. Each landlord who demands or accepts a higher rent than said maximum rent shall inform the tenant or any prospective tenant of the rental unit in writing of the factual justification for the difference between said maximum rent and the rent which the landlord is currently charging or proposes to charge. (Amended by Ord. No. 154,237, Eff. 8/30/80, Oper. 9/1/80.) D. For a rental unit for which a four dollar fee has been paid pursuant to Subdivision 3. of Subsection B. of this section, the landlord, for the month of April, 1981, and on a one time basis only, may demand and collect a total of four dollars per rental unit from the tenant of the rental unit after serving the tenant with a thirty days written notice on a form provided by the Department explaining the nature of the onetime charge. (Amended by Ord. No. 154,237, Eff. 8/30/80, Oper. 9/1/80.) E. For a rental unit for which a registration or registration renewal fee has been paid pursuant to Subdivision 4. of Subsection B.