Commencement of CGST Amendment Act brings specified provisions into force, excluding enumerated clauses by notification. Appointment of 1 February 2019 as the commencement date for most provisions of the Central Goods and Services Tax (Amendment) Act, 2018, issued under the empowering provision of sub-section (2) of section 1; the notification brings the Amendment Act into force by notification while expressly excluding certain enumerated provisions and clauses from commencement.