The Electricity Act of 2003 consolidates laws relating to electricity generation, transmission, distribution and use in India. It aims to promote competition and protect consumer interests in the electricity industry. Key aspects covered include establishing the Central Electricity Authority and State Electricity Regulatory Commissions to regulate tariffs and policies, and setting up an Appellate Tribunal to handle disputes. The Act defines important terms related to electricity supply and regulates various areas of the industry including generation, transmission, distribution and trading of power.