The original constitution did not contain provisions with respect to tribunals.The 42nd Amendment of 1976 added a new Part XIV-A which includes two Articles
Article 323-A :   Deals with the Administrative tribunals
Article 323-B : for other matters.

In pursuance of Article 323-A the parliament has passed the Administrative Tribunal Act in 1985 which authorises the central government to establish one Central Administrative Tribunal and State Administrative Tribunal.

Central Administrative Tribunals (CAT)
Establishment and Constitutional Basis:
• Established under Article 323A of the Indian Constitution by the Administrative Tribunals Act, 1985. 
• Created to provide a specialized forum for resolving disputes and grievances of central government employees.
Composition and Structure:
• Chaired by a retired Chief Justice of a High Court or Supreme Court Judge.
• Members include judicial and administrative members, drawn from experienced civil servants.

Jurisdiction:
• Original jurisdiction over service matters of central government employees, encompassing:
    • Recruitment 
    • Promotion 
    • Transfer 
    • Pension
    • Disciplinary actions
• Appellate jurisdiction over orders of disciplinary authorities.

Objectives:
• To provide a swift and cost-effective forum for resolving service-related disputes.
• To reduce the burden on regular courts.
• To ensure fair and impartial adjudication of grievances.

Significance:
• Promotes administrative efficiency and accountability.
• Protects the rights of government employees.
• Reduces delays in resolving service-related disputes.

State Administrative Tribunals (SAT)
Constitutional Basis: 
Article 323A of the Indian Constitution empowers Parliament to establish administrative tribunals.
Establishment: Central Government establishes SATs at the request of State Governments.
Jurisdiction: Adjudicate disputes related to recruitment and service conditions of state government employees.
Composition: Chairman and members appointed by the President in consultation with the Governor.
Objective: To provide a specialized, speedy, and less formal forum for resolving administrative disputes, reducing the burden on regular courts.