The Civil Aviation Authority the Netherlands (CAA NL), part of the Human Environment and Transport Inspectorate (ILT), and Airport Coordination Netherlands (ACNL) supervise slot misuse in the Netherlands. The Slot Enforcement Code (SEC) has been jointly drawn up in order to make optimum use of the available capacity at coordinated airports.
The Slot Enforcement Code describes what CAA NL and ACNL understand by the different forms of slot misuse, what sanctions can be imposed when and by whom. The Slot Enforcement Code clarifies and coordinates the already existing legal competences of the monitoring and enforcement bodies; it does not contain any new (legal) competences, sanctions or forms of slot misuse.