Access control of the Aircraft is the responsibility of

Access control of the Aircraft is the responsibility of

ASG
Local police
Aircraft operator
Airport security
This question was previously asked in
UPSC CISF-AC-EXE – 2018
In the context of Indian airport security, the Airport Security Group (ASG), primarily manned by the Central Industrial Security Force (CISF), is responsible for the overall security of the airport premises, including access control to critical areas like the apron, taxiways, runways, and aircraft parked there. While the aircraft operator (airline) is responsible for security procedures related to passengers and cargo *on* the aircraft and their own internal security, physical access control *to* the aircraft when on the ground at the airport is a primary function of the ASG.
The ASG (CISF in India) is the designated authority for maintaining security and controlling access within the airport’s sterile and restricted areas, which includes controlling access to parked aircraft.
Airport security involves multiple layers and agencies. The Airport Operator manages the infrastructure, Local Police handle law and order issues outside the airport’s security perimeter (or sometimes in public areas), Aircraft Operators implement airline-specific security measures and screen passengers/baggage, while the ASG provides the main security force controlling access to restricted areas and responding to security threats on the airport property.