Commencement of Amendment Act: executive notification appoints the date on which the constitutional amendment comes into force.
The Central Government issued a legislative notification under the Amendment Act empowering provision, appointing a day in September 1987 as the date on which the Constitution (Fifty seventh Amendment) Act, 1987 shall come into force, formalised by the Ministry of Law and Justice.

Commencement date appointed for Constitution (Fifty-sixth) Amendment Act, confirming the Act comes into force on 30 May 1987.
Under the authority of section 1(2) of the Constitution (Fifty-sixth Amendment) Act, 1987, the Central Government issued notification S.O. 517(E) dated 26 May 1987 appointing 30 May 1987 as the date on which the Act shall come into force.

Commencement date appointed for the Constitution (Fifty fifth Amendment) Act to bring it into force by central government notification.
The Central Government, exercising the power conferred by sub section (2) of Section 1 of the Constitution (Fifty fifth Amendment) Act, 1986, by notification issued through the Ministry of Home Affairs appointed the date on which the Amendment Act shall come into force, thereby giving effect to the Act's commencement provision.

Commencement date: Constitution (Fifty-Third Amendment) Act, 1986 appointed to come into force on 20 February 1987.
The Central Government, invoking the power under sub section (2) of section 1 of the Constitution (Fifty-Third Amendment) Act, 1986, by notification S.O. 71(E) dated 11 2 1987, appointed 20th February 1987 as the date on which the Act shall come into force.

Commencement of Constitution Amendment: Central Government notified the Act to come into force on the appointed date.
The Central Government, exercising the authority conferred by sub-section (2) of section 1 of the Constitution (Fifty-first Amendment) Act, 1984, by notification issued through the Ministry of Law and Justice, appoints a specific calendar date as the day on which the Act shall come into force.

Commencement date appointed for Constitution (Fifty-second Amendment) Act, ensuring the Act comes into force as notified.
The Central Government, under sub section (2) of section 1 of the Constitution (Fifty-second Amendment) Act, 1985, notifies that the Act shall come into force on the 1st day of March, 1985, issued by the Ministry of Law and Justice as the formal appointment of the commencement date.

Commencement of constitutional amendment: specified provisions to commence on the day after notification publication.
The Central Government, exercising the power conferred by subsection (2) of section 1 of the Constitution (Forty-fourth Amendment) Act, 1978, notifies that the date immediately following publication of this notification in the Official Gazette is appointed as the date on which the identified provisions of the Amendment Act shall come into force.

Commencement of constitutional amendment sections designated in notification sets staggered entry into force under executive power.
The Central Government, under the commencement provision of the Constitution (Forty-fourth Amendment) Act, 1978, appoints separate dates for the coming into force of specified sections: one group of sections to commence on the date immediately following publication of the notification and another group to commence on a subsequently specified date, thereby effecting a staggered entry into force of the Amendment's provisions.

Customs and excise amendments reshape valuation, refund limits, recovery powers, and duty deferment for Advance Licence imports.
The Act amends customs, central excise, and revenue-board law by revising valuation, limitation, refund, recovery, warehousing, revision, and delegation provisions, while introducing powers to waive duties not levied or short-levied because of a generally prevalent practice. It also creates a duty deferment mechanism for Advance Licence imports subject to export obligation, with adjustment against drawback, interest on unpaid duty, and possible bond conditions. On the excise side, it provides for remission of duty on natural shortages, recovery of duty not levied or refunded, a structured refund regime, and revised appellate and revisional procedures.

Commencement of constitutional amendments: staggered bringing into force of specified Forty second Amendment sections across January, February and April.
The Central Government, under sub section (2) of section 1 of the Constitution (Forty second Amendment) Act, 1976, appoints specified sections of the Act to come into force on three distinct dates, thereby fixing the legal commencement dates for listed provisions and operationalising the Amendment through a staged, section wise activation.

Increase of Scheduled Areas and power to rescind and redefine areas following Governor consultation.
Amendment adds two powers to paragraph 6(2) of the Fifth Schedule: authority to increase the area of any Scheduled Area in a State after consultation with the Governor, and authority to rescind previous orders and, in consultation with the Governor, make fresh orders redefining the areas to be Scheduled Areas.

Repealing and amending legislation preserves existing rights while repealing listed enactments and revising targeted statutory language.
Repealing and Amending Act, 1974 repeals the enactments listed in the First Schedule to the extent specified there and amends the enactments listed in the Second Schedule to the extent and in the manner specified in that Schedule. It also makes a specific amendment to the Sixth Schedule to the Constitution by substituting "cattle pounds" for "cattle ponds" in paragraph 6, and includes a saving clause preserving prior acts, rights, liabilities, remedies, proceedings, and existing legal principles.

Adaptation of Union laws: reallocate jurisdiction, territorial definitions and tax provisions to reflect North Eastern reorganisation.
The Order adapts central statutes for application in the reorganised North Eastern States and Union territories by modifying jurisdictional references, territorial definitions and consequential provisions. It designates the Gauhati High Court for matters arising in Arunachal Pradesh and Mizoram, equates certain local offices with District Magistrates, amends schedules and territorial compositions for administrative laws, and adjusts tax and representation statutes to preserve jurisdictional treatment and exemptions for specified categories, with interpretation governed by the General Clauses Act.

Commencement of Constitution (Thirtieth Amendment) Act: government appoints its coming into force by notification on the specified date.
The Central Government, exercising the power conferred by sub section (2) of section 1 of the Constitution (Thirtieth Amendment) Act, 1972, appointed 27 February 1973 as the date on which the Act shall come into force by a notification issued by the Ministry of Law, Justice & Company Affairs (Department of Legal Affairs).

Commencement of Constitution (Twenty-eighth Amendment) Act: Government appoints its coming into force on the specified date.
By G.S.R. 391(E) dated 29-8-1972, the Central Government, exercising the power conferred by the enabling provision in Section 1, appoints the 29th day of August, 1972 as the date on which the Constitution (Twenty-eighth Amendment) Act, 1972 shall come into force via formal Gazette notification.

Commencement date set for the Constitution (Twenty-seventh Amendment) Act, bringing most of its provisions into force.
The Central Government, invoking the power conferred by sub section (2) of section 1 of the Constitution (Twenty-seventh Amendment) Act, 1971, issued an official notification appointing a commencement date on which the Act's provisions, other than sections 1 and 3 which had already come into force, shall come into force.

Public Provident Fund Scheme creates a statutory long term savings framework by Central Government notification under enabling Act.
The Central Government, under the enabling provision of the Public Provident Fund Act, issued notification G.S.R. 1136 dated 15 June 1960 to promulgate the Public Provident Fund Scheme, 1968, establishing the regulatory framework, terms and administrative mechanism for a long term provident savings scheme.