I use my USSSA bat during batting practice to minimize the wear and tear on my SSUSA bats. If i have the USSSA bat in my bag and am tagged for bat testing does the mere presence of that bat get me in trouble? I would not use it in a game of course, and the umpire would not see it during bat inspection prior to a game.
The simple answer is don't bring it to the field but often we're practicing offsite and then move to the tournament facility and honestly I'll simply forget.
thanks