Rules Question: Brandenburgers’ In Game Effect Requirements

Dear Warlord Community,

I have another question: Does a unit of Brandenburgers’  HAVE to be on the board for their reserve effects to take place in the game? There are several iterations of Brandenburgers’ in the campaign books, but the rules are ambiguous in the requirements for Bradenburgers’ effects (should be FAQ’ed, hmmm Warlord and maybe nerfed a bit?).

Does this imply that Brandenburgers’ effects are universal you just need to have them in your army list and they can be in reserved or on the board for their effects to take place? What if the unit is destroyed?

OR can a case be made that Brandenburgers’ HAVE to be on the board for effects to take place, the precedence being from other units that explicitly mentioned when their rules can take effect when in reserves:

Case #1: Across the Volga Artillery in the Stalingrad book (explicit effects when not on the board)

Case #2: German Infiltration Squad in Battle of the Bulge book (explicit effects when not on the board)

The Brandenburgers’ rules do not have these explicit statements of their effects working in reserve as these units have..

So, what does that imply:

– Does the Brandenburgers’ effects work in reserve because their effect requirements are ambiguous, and we can imply what we want from it?

– OR the Brandenburgers’ effects DO NOT WORK in reserve, because their effects does not explicitly state that they work in reserve, using the above units that have explicitly stated their rules work in reserve as precedence to make this argument.

Or is there another game rule that gives clarity on this?