The Comptroller and Auditor General of India is the Constitutional Authority in India, established under Article 148 of the Constitution of India. He is empowered to Audit all receipts and expenditure of the Government of India and the State Governments, including those of autonomous bodies and corporations substantially financed by the Government. The CAG is also the statutory auditor of Government-owned corporations and conducts supplementary audit of government companies in which the Government has an equity share of at least 51 per cent or subsidiary companies of existing government companies.