The Nuclear Command Authority (NCA) is an institutional concept and the apex decision-making body in India responsible for the command, control, and operational decisions concerning the country's nuclear weapons programme. It was formally established on January 4, 2003, by the Cabinet Committee on Security (CCS). The NCA was created to solve the problem of ensuring a clear, secure Command and Control (C2) mechanism and maintaining firm civilian control over the nuclear arsenal following the 1998 nuclear tests.
The NCA operates through a two-tiered mechanism: the Political Council and the Executive Council. The Political Council, chaired by the Prime Minister of India, is the highest authority and the only body empowered to authorize the use of nuclear weapons. The Executive Council, chaired by the National Security Advisor (NSA), provides the necessary inputs, advice, and technical assessments to the Political Council and is responsible for implementing its directives. The directives of the NCA are operationalized by the Strategic Forces Command (SFC), a tri-services command responsible for the management and administration of the nuclear forces.
The NCA is intrinsically connected to India's Nuclear Doctrine, which is based on the principles of a "No First Use" (NFU) policy and maintaining a "Credible Minimum Deterrent". While the NCA's structure and the core doctrine remain officially unchanged, the 2003 announcement included a provision that India would retain the option of using nuclear weapons in retaliation against a biological or chemical weapons attack. Recent developments, such as the deployment of canisterized missiles and a maturing sea-based deterrent, suggest a quiet shift towards greater operational readiness, but the formal structure of the NCA and its civilian control mechanism have stayed the same.