Currently a new treaty between KNF and GMG is in the works, it surely will cover the raised issue in some way.
I'm not sure how relations are between the GMG and Rheinland though.
Also, this doesn't mean that any of the faction will neglect their role and the other systems of their house.
It is mainly there to promote activity and roleplay through cooperation.
I'm sure the unlawful factions don't like this and maybe it gives them a reason to be active and fight against this treaty.
The hogosha might decide to target Rheinland shipping in the sigmas because of this. All in all, this should promote activity in some way. Hopefully.