I will let Raboude help you on this but I want to share my knowledge of the structure.
Some sub-forum are old and haven't been used by the Ministers of Justice since the end of the reign of Jade.
DKR, Italy, Lotharingie were workroom created separate to prepare for trial. Hence the group related to them gave access to each. As an example, a prosecutor for a trial in Lotharingie could have a workroom to gather evidences, prepare his speech, etc.
Personnaly, I would recommand the change of name from "Italy" (since we have CAPI) to "other regions" which could include Mainz, Styria, Holland and Celje. I would also change the name of "Lotharingie" since the Kingdom was abolished.
For the groups :
[Justice] High Court : Gives the modo to the Minister of Justice - Gertrud shouldn't be in this group
[Justice] Juridic Team : If I am not mistaking, it was added to include the vice-ministers of Justice - Maybe put Gertrud there to allow access to the office of the Minister of Justice
[Justice] Verfassungskommission : Can be deleted - it used to give access to a room, now archived, not used since Adala
[Justice] Commission - Meeting : To discuss future use - Created under Pusu for the President of the Commission to meet with the protagonist in the accusation against an Imperial Councillor
[Justice] Commission - Private : To discuss future use - Created under Pusu for the President of the Commission to analyze the accusation against an Imperial Councillor
I hope it helped...