Contractual congestion management at the interconnections

For the purpose of contractual congestion management, transmission system operator offers the service of interruptible capacity in the amount of the technical capacity, it provides trade at the secondary market and in case of contractual congestion at the interconnection besides the above mentioned it applies also the following procedures: 

1. Surrender of contracted firm capacity
2. Withdrawal of long-term contracted unused firm capacity
3. Additional firm capacity offering and a buy-back of the contracted firm capacity

 
Contractual congestion management measures have been stipulated by the chapter XXI of the Transmission System Network Code.
 
In case of surrender of the contracted firm capacity or withdrawal of the long-term contracted unused firm capacity the transmission system user and the transmission system operator enter into agreement on the surrender of the contracted firm capacity. The integral part of the relevant Agreement are the following documents: 

1. Contract on gas transmission
2. Notice on the surrender of the contracted firm capacity (to be completed by the transmission system user)
3. Notice on the allocated transmission system capacity (to be completed by the transmission system operator)
4. Decision by the Regulatory Agency (in case of a withdrawal of the long-term contracted unused firm capacity)