Any fee payable under section 55(a) of the Act must be paid as soon as the licence is issued, and-
(a) if the licence is issued for a fixed period, the total amount for that period, unless the Minister has agreed to different terms; or
(b) if the licence is issued for an indefinite period, the total amount for that period or at intervals set by the Minister, but the period or intervals must be for at least three months.