(1) The time within which the penalty payable under an * infringement notice must be paid is 28 days after the day on which the notice is issued.
(2) The * Slot Manager may extend the time within which the penalty must be paid. The following provisions apply to extensions of time:
(a) an extension must not be for longer than 28 days;
(b) only one extension may be given;
(c) an extension may be given before or after the end of the initial time for payment of the penalty.