Single-Sided Nominations
From late 2015, the European Commission stipulated in the CAM/CMP network codes that parties should be allowed to send Single-Sided Nominations (SSNs) at interconnection points (IPs).
This means that parties can use their capacity on both sides of the border point with only one nomination. This type of Single-Sided Nomination (SSN) should be sent to the ‘active’ TSO, which in turn forwards it to the adjacent (‘passive’) TSO via a DELORD (type ANC) message.
The introduction of the Single-Sided Nomination mechanism has led to ‘traditional’ nominations being called Double-Sided Nominations (DSN).
Before using the SSN mechanism, however, a number of conditions have to be met. First of all, the SSN mechanism should apply at the network point. The network points concerned can be found in appendix 1 of the TSC, in column ‘SingleSidedNom?’ Secondly, a Nomination Authorisation (NOMAUT) message is required. This is an authorisation indicating that one or more countershippers are entitled to nominate on your behalf at that specific network point. The use of Edig@s version 5.1 (or higher) is also a requirement and should only be used following successful testing between the two TSOs involved.
If you intend to use the Single-Sided Nomination mechanism, you should first contact our team Nomination Support.
For more detailed information on the operational process, please refer to the relevant information below and our website:
- EASEE-gas Common Business Practice 2014-001/01 ‘Harmonization of the Nomination and Matching Process for Double-Sided and Single-Sided Nomination’;
- Message Implementation Guidelines Edig@s version 5.1