Integrated tax on inter State supplies and imports with reverse charge and e commerce operator liabilities clarified. The Act levies integrated tax on inter State supplies and imports, prescribes valuation and place of supply rules for goods and services (including territorial waters and imported services), allows executive notifications for reverse charge and e commerce operator liability, and provides for exemptions, zero rating of exports and SEZ supplies, refunds for tourists, credit utilisation across tax heads, apportionment between Union and States, and rulemaking and regulatory powers for implementation.