South African Reserve Bank Act, 1989 (Act No. 90 of 1989)

A bank shall maintain the minimum reserve balances contemplated in subsections (2) and (3)(b), respectively, of section 10A of the Act during the period from the fifteenth business day of the month following the month to which a particular return on form DI 310 relates, up to and including the fourteenth business day of the month following the month in respect of which the next such return is to be furnished by the reporting bank.