Permits for Overflight are required to be applied 2-3 days prior to the operation for private nonrevenue and for charter (non-scheduled commercial) flights. At the discretion of MCAA permits on short notice can be processed but a minimum of 01 days is required. Any changes of Departure/Destination point within the same country, a revision of Overfly permit is required. Permit revisions are always required for changes on origin/destination, change of schedule and route changes - if outside the +/- 72 hour permit window.