4(1)A fixed monetary penalty must be paid within the period of 28 days beginning with the day on which the notice under paragraph 2(4) is received.S
(2)If the penalty is not paid within that period the amount payable is increased by 25%.
(3)If the penalty (as increased by sub-paragraph (2)) is not paid within the period of 56 days beginning with the day on which the notice under paragraph 2(4) is received, the amount payable is the amount of the fixed monetary penalty originally imposed increased by 50%.
(4)In the case of an appeal, any penalty which falls to be paid, whether because the sheriff upheld the penalty or because the appeal was withdrawn, is payable within the period of 28 days beginning with the day of determination or withdrawal of the appeal, and if not paid within that period the amount payable is increased by 25%.
(5)If the penalty (as increased by sub-paragraph (4)) is not paid within the period of 56 days beginning with the day of determination or withdrawal of the appeal, the amount payable is the amount of the fixed monetary penalty originally imposed increased by 50%.