According to the network code governing third-party access to the German gas networks, the so-called Cooperation Agreement (Kooperationsvereinbarung), by the 17th business day of each month network operators are required to notify the market area manager of the allocation groups (Zeitreihentypen) they are going to report for each balancing (sub)group in their network area in the following delivery month by submitting a so-called declaration list (Deklarationsliste).
Network operators must submit their declaration lists in TSIMSG format. Alternatively, NetConnect Germany provides registered users of the Market Partner Portal with the option to submit their declaration lists through the portal.
Following the initial submission of the declaration lists there is the option of running a declaration clearing process. The relevant rules and further information on declarations can be found here.