GST is applicable on ‘supply’ of goods or services as against the present concept on the manufacture of goods or on sale of goods or on provision of services. GST is based on the principle of destination-based consumption taxation as against the present principle of origin-based taxation.It is a dual GST with the Centre and the States simultaneously levying tax on a common base. GST to be levied by the Centre would be called Central GST(CGST) and that to be levied by the States would be called State GST (SGST).An Integrated GST (IGST) would be levied an inter-state supply (including stock transfers) of goods or services. This shall be levied and collected by the Government of India and such tax shall be apportioned between the Union and the States in the manner as may be provided by Parliament by Law on the recommendation of the GST Council. A common threshold exemption would apply to both CGST and SGST. Tax payers with an annual turnover not exceeding Rs.20 lakh (Rs.10 Lakh for special category States) would be exempt from GST. For small taxpayers with an aggregate turnover in a financial year upto 50 lakhs, a composition scheme is available. Under the scheme a taxpayer shall pay tax as a percentage of his turnover in a State during the year without benefit of Input Tax Credit. This scheme will be optional.GST on five specified petroleum products (Crude, Petrol, Diesel, ATF & Natural Gas) would by applicable from a date to be recommended by the GSTC.GST would apply on all goods and services except Alcohol for human consumption.