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 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 declaration lists is forwarded to the balancing group managers by the 18th business day.