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 (
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). The market area manager forwards the declaration lists it receives to the balancing group managers by the 18th business day.
currently valid declarations are made available to network operators
and balancing group managers on the Market Partner 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.