Section 3(vi) in The Ministry of Civil Aviation (Height Restrictions for Safeguarding of Aircraft Operations) Rules, 2015
(vi)"Colour Coded Zoning Map" of an airport means the map, prepared and certified by the Airports Authority indicating the areas around the airport in different colour coded grids with the permissible heights above mean sea level for the purpose of aerodrome safeguarding and a model Colour Coded Zoning Map of Navi Mumbai International Airport is given at Schedule IX;
