Booking of interruptible capacity

Interruptible capacity is offered only if all firm capacity has been sold for the respective gas day. The booking of interruptible capacity is carried out as follows:

• Interruptible capacity as a day-ahead product is offered on the GSA platform after the end of the day-ahead firm capacity auction, no earlier than 18:30.
• The within-day product is available via the over-nomination process and is not offered as a separate auction on the GSA platform.

The over-nomination process means that if all firm capacity has been sold, then starting from 20:00 on D-1, for the respective gas day, it is possible to book an interruptible within-day capacity product by submitting a nomination to both operators that exceeds the capacity available to the user. During the matching process, the higher nomination will be approved, and an additional interruptible within-day capacity product will be allocated.