1.0 GENERAL Nigerian Civil Aviation Authority Advisory Circulars from Aerodrome Standards Department contain information about standards, practices and procedures that the Authority has found to be an Acceptable Means of Compliance (AMC) with the associated Regulations. An AMC is not intended to be the only means of compliance with a regulation, and consideration will be given to other methods of compliance that may be presented to the Authority. 2.0 PURPOSE This Advisory Circular provides methods, acceptable to the Authority, for showing compliance with the Procedures to Evaluate the Impact on Safety by the proposed change in the physical characteristics, Facilities or equipment at an Aerodrome.