The Human Environment and Transport Inspectorate (ILT) is the competent authority to supervise and sanction violations of slot-misuse at all coordinated airports in the Netherlands. The ILT is authorised to sanction the following types of slot misuse:
- Violations of the night slot regime on Schiphol Airport
- Operation of flights without a slot (NOREC)
- Repeatedly and intentionally not operating flights for which a slot was allocated (NOOPS)
- Repeatedly and intentionally not operating flights on times as allocated
- Repeatedly and intentionally operating flights in a different way as allocated for