It really doesn't say that at all. Read it - its not complicated. It merely recommends avoiding car sharing. There is no direct instruction eg drink bottles, handshakes etc. If it was a specific instruction it would have been made a clear directive.
Track n trace isolated all our players that took part on Saturday's game. The boys joked we weren't that good to get close to their players for long enough, but someone made the call to do it at track n trace