I think maybe he is referring to the dual clanning issue. That him and his mates play together as a unit but they are not official and would that fall under the dual clanning policy.
Yes I believe so too and to answer that question: This is not viewed as dual clanning, as it's not a milsim unit. The dual clanning rule only applies to other
milsim units and excludes the likes of wasteland, king of the hill, exile, breaking point, battle royale and arma life servers - you are free to join those with your friends. Although as a fair warning: once you go milsim you'll lose the interest for all the other arma modifications.
However the
7th CAV is a milsim unit and this would be viewed as dual clanning.
Respectfully,
WO1 Waller
Recruiting Office Detachment Personnel