Temporal scope of Customs Act provision altered, changing its applicability window under recent legislative amendment. The amendment substitutes the commencement phrase in subsection (1), deleting the qualifying words that applied the provision to acts or events occurring on or after a specified past date and replacing them with words that limit the provision's applicability to acts or events occurring before a later specified date, thereby altering the period during which the provision applies and changing the statutory window of applicability without modifying the substantive wording of the remainder of subsection (1).