Shooting at DELHI AIRPORT

Are the authorities relaxed about aircraft photography at Delhi or do you get trouble?

There are two sides of DEL Airport one the “Air Force Side” and another the “Civil Side” RWY 28 & 29 Belongs to civil. The DGCA rules Aircraft 13 States Photography is not allowed at Defence Airports it also states –

No person shall take, or cause or permit to be taken, at a Government aerodrome or from an aircraft in flight, any photograph except in accordance with and subject to the terms and conditions of a permission in writing granted by the Director-General, a Joint Director General, a Deputy Director-General or the Director of Regulations and Information of the Civil Aviation Department :

Provided that the Director-General from time to time, may, by notification in the official Gazette, direct that these restrictions shall not apply to photography at any Government aerodrome, or within such limits of any Government aerodrome as may be specified in the order.

Now coming to the main point i.e Photography near an airport
This is the grey area. If you are taking photographs of aircraft in the sky, it is your right, and there is no law under which this is disallowed.

If you are taking photographs from outside a civilian airport in to the airport, there is again no actual law preventing you. Rule 13 prohibits photography AT airports not OF airports. Do not take photographs at or into a defence airport, you are inviting trouble.