Generally National aviation authority in the state in which the aircraft is registered, issued a Certificate of Airworthiness (CofA) for an aircraft. Apart from that all scheduled / non-scheduled flights into, from or over the territory of any country (FIR -Flight Information Region) need to obtain a flight clearance permit at least 72 hours prior to date of intended flight.
The cost recovery for the service provision for flight clearance is solely for the administrative cost incurred and not for the permit itself for that reason charges are not refundable. Not refundable because the administrative Service provided for both acceptance or refusal of permit is the same.
Normally all scheduled airlines have their local agent in every country to manage the permit requests, who apply, pay and obtain permit on behalf of direct airline. So in that case permit requests can be initiate either by direct airline or by local agent operator.
Operator must enter all the required data needed for a permit request.Operator gets an email notification with a Reference number to be used for Payment.
There shall be a link for invoice on the clearance details page. When an operator clicks on this link, an invoice will be generated for the operator to download and make payment. Operator can make bulk or Pre-payments (Advance / Deposit Payment) for permit. Operator gets alert to notify them of their remaining balance if it falls below a certain threshold.
AIS (Aeronautical Information Service) will only see paid requests and action on it. Only AIS staff can validate clearance request. Payments are non-refundable. Based on the airworthiness standards at the time of validation and verification process, AIS staff either accept or refuse the permit request. Permit Number only generated in case of acceptance of permit request.
A director or authority can also issue special flight permit for an aircraft that currently may not meet applicable airworthiness requirements, but is capable of safe flight in some special reasons.