The Central Bureau of Investigation (CBI) is the premier investigating agency in India, responsible for handling a wide range of complex and high-profile cases. It operates under the administrative control of the Department of Personnel and Training (DoPT), which is part of the Ministry of Personnel, Public Grievances and Pensions.

The CBI was established in 1941 as the Special Police Establishment with the primary objective of investigating corruption cases. Over the years, its jurisdiction has expanded to cover other areas such as economic offenses, cyber crimes, terrorism, and organized crime.

The administrative control of the CBI is crucial as it determines the agency's functioning, budget, and overall management. The DoPT, which is responsible for the appointment and management of civil servants in India, plays a key role in overseeing the operations of the CBI.

Under the DoPT, the CBI is headed by a Director who is appointed by the Central Government. The Director is responsible for the overall functioning and management of the agency. The Director is assisted by a team of officers who are appointed from various services, including the Indian Police Service (IPS) and other central services.

The DoPT provides the necessary support to the CBI in terms of infrastructure, manpower, and training. It also formulates policies and guidelines for the agency and ensures their effective implementation. The DoPT also plays a role in the selection and appointment of officers to key positions within the CBI.

The CBI also works closely with other central agencies such as the Central Vigilance Commission (CVC), which is responsible for preventing corruption in the government. While the CVC provides guidance and advice to the CBI, it does not have direct administrative control over the agency.

In conclusion, the Central Bureau of Investigation (CBI) operates under the administrative control of the Department of Personnel and Training (DoPT), which is part of the Ministry of Personnel, Public Grievances and Pensions. The DoPT plays a crucial role in overseeing the operations of the CBI and providing the necessary support for its functioning.