Commencement of Constitutional Amendment: remaining provisions of the One Hundred and First Amendment Act were appointed to come into force.
The Central Government, under sub section (2) of section 1 of the One Hundred and First Amendment Act, 2016, appointed 16 September 2016 as the date on which Sections 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19 and 20 shall come into force, noting that Section 12 had come into effect earlier on 12 September 2016.

Goods and Services Tax Council constituted establishing Chairperson and member representation for tax governance and coordination.
Constitutes the Goods and Services Tax Council by presidential order under the Constitution, prescribing core membership: the Union Finance Minister as Chairperson, the Union Minister of State in charge of Revenue or Finance as a member, and, for each State, the minister in charge of Finance or Taxation or a nominated minister as member; thereby establishing the institutional forum for intergovernmental consultation and coordination on GST policy and administration.

Formation of GST Council: provisions under the Amendment Act take effect from 12 September 2016 by government notification.
The Central Government, invoking the commencement power under the constitutional amendment, appointed 12 September 2016 as the date on which the provisions concerning formation of the GST Council shall come into force by official notification.