That appear to be just a list building restriction, much like older editions’ rule that a list had to include a hacker to take REMs. The original list must include one trooper with the commlink rule, thematically to ‘call in’ the reinforcements. They then pick a separate Combat Group of up to 5 models, 100pts and 2SWC from the Reinforcements roster for their faction (a vanilla faction and its Sectorials all draw from the same roster). The basic premise is that if playing with Reinforcements, each player composes a 250pt, 5SWC list as normal, which is limited to 1 combat group.

It remains to be seen to what extent, or at all, it is adopted as a standard by the wider Infinity community. Reinforcements is an upcoming extra game mode, similar to including mercenaries, or playing with Limited Insertion (only 1 combat group) as some events may choose to do, or you could agree to play with a friend.

Complications of Trooper Limits and Reinforcements.

Nomad Reinforcements: Vipera Pursuit Force.Polyvalent Security Unit Brigade VIDOCQ.Haqqislam Reinforcements: Melek Reaction Force.Pan Oceanian Reinforcements: Code Capitol.

Company of heroes 2 why no faction mods