Airports Authority of India has introduced NOCAS, NO Objection Certificate Application System, to accept online applications for height clearance for the structures such as buildings, masts, chimney and billboard etc. for Safeguarding the Airspace in and around the civil airports as per the rules laid down in GSR 751 (E), issued by Ministry of Civil Aviation on 30th September, 2015. For the Defence Airports, responsibility has been assigned to the respective Defence Authorities.

Guidance material for applicants is available on Airports Authority of India website ( http://nocas2.aai.aero/nocas/index.html ). However,we have also provided guideline documents for ready reference to our elite customers.

• Guidelines for Applicant
• Guidelines for CCZM
• Guidelines for Aeronautical Study Approved by Competent Authority
• A) Aeronautical Study Proceedings
• B) Guidelines of Maximum Allowable Penetration of OLS through Aeronautical Study
• GSR_751(E)