Commencement notification for customs and excise amendment law fixes the effective date, excluding specified sections from commencement. The Central Government appointed 1 July 1988 as the commencement date for the Customs and Central Excises Laws (Amendment) Act, 1988. All provisions of the Act were brought into force on that date except Sections 4, 5, 11, 12 and 16, which were specifically left outside the commencement notification.