Goods and Services Tax: constitutional amendment grants concurrent taxing power and establishes a national GST Council to harmonise rules.
The amendment creates a constitutional framework for a goods and services tax by granting concurrent power to Union and State Legislatures to tax supplies, reserving exclusive parliamentary power for inter State supplies, defining GST and related terms, subsuming specified indirect taxes, and establishing a mechanism for central collection and apportionment of GST on inter State supplies, including Parliament's power to set place of supply principles and a temporary additional tax assignment to States.

Compensation to States secures transitional revenue protection under GST while origin-based additional tax aids state finances.
Implementation of GST includes temporary fiscal measures: a centrally collected additional tax on inter state supplies assigned to the State of origin to aid transition, a time limited compensation mechanism for State revenue loss caused by GST, and the exclusion of petroleum products from GST until a Council recommended notification, all enabled by the constitutional amendment facilitating GST.