Landing permit
A landing permit is state-level permission for a foreign aircraft to land in a country, separate from the airport's own slot or PPR. Countries such as India, Indonesia, Nigeria, Saudi Arabia and Russia require them for most private and charter flights, and they usually demand passenger and crew details, the sponsor or purpose of the visit, and aircraft documents. Lead times range from 24 hours to ten working days, and a change of date or tail number can invalidate the permit. Charter operators build permit fees and lead times into international quotes, which is why a quick trip to a permit-heavy country is rarely as quick as it sounds.