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The Worldwide Airport Slot Guidelines (WASG) are the foundation of the global slot coordination process. The WASG is jointly published by IATA, Airports Council International (ACI) and the Worldwide Airport Coordinators Group (WWACG). The WASG is built on the pillars of transparency, flexibility, certainty, consistency, and sustainability. Thanks to continual update and revision, the WASG represents the globally accepted best practice and ensures that slots at coordinated airports are neutrally and fairly allocated to airlines using consistent policies, principles, and processes.

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Objectives of the WASG

The prime objective of airport slot coordination is to ensure the most efficient declaration, allocation and use of available airport capacity in order to optimize benefits to consumers, taking into account the interests of airports and airlines.

  1. To facilitate consumer choice of air services, improve global connectivity and enhance competition at congested airports for passengers and cargo.
  2. To provide consumers with convenient schedules that meet demand, are consistent from one season to the next, and reliable in terms of their operability.
  3. To ensure that slots are allocated at congested airports in an open, fair, transparent and non-discriminatory manner by a slot coordinator acting independently.
  4. To realize the full capacity potential of the airport infrastructure and to promote regular reviews of such capacity and demand that enable effectual capacity declarations for slot allocation on a seasonal basis.
  5. To balance airport access opportunities for existing and new airlines.
  6. To provide flexibility for the industry to respond to regulatory and changing market conditions, as well as changing consumer demand.
  7. To minimize congestion and delays.

WASG Annexes

WASB Best Practices

Managing temporary reductions of airport capacity (pdf) - Guidance to manage temporary reductions of airport capacity announced after the confirmation of seasonal capacity parameters. All guidance is complementary to the Worldwide Airport Slot Guidelines.