The Constitution provides for delineation of power to tax between the Centre and States. While the Centre is empowered to tax services and goods upto the production stage, the States have the power to tax sale of goods. The States do not have the powers to levy a tax on supply of services while the Centre does not have power to levy tax on the sale of goods. Thus, the Constitution does not vest express power either in the Central or State Government to levy a tax on the ‘supply of goods and services’. Moreover, the Constitution also does not empower the States to impose tax on imports. Therefore, it is essential to have Constitutional Amendments for empowering the Centre to levy tax on sale of goods and States for levy of service tax and tax on imports and other consequential issues.

As part of the exercise on Constitutional Amendment, there would be a special attention to the formulation of a mechanism for upholding the need for a harmonious structure for GST along with the concern for the powers of the Centre and the States in a federal structure.