The Prior Permission Required is a requirement for pilots and operators, often mandatory, necessary to obtain an explicit authorization from the competent authorities before condicting specific aviation activities, for instance the landing at certain airports or the use of restricted air spaces.
Among the basic regulatory mechanisms in the aviation sector, the PPR governs the access to designated air spaces and airports, thus contributing to safety and an efficient management of all flight operations. All involved operators must give priority to the compliance with such requirements, hence promoting adeguate planning, communication, and optimize the operative result.