My motto is: If ya gotta ask, its probably wrong.

Seriously though, you'll get a ticket for sure if you're fighting a fish past the boundry. They hear all the excuses in the world on a daily basis.... they really aren't all that open to hearing how you started in legal water, and the fish took you past the boundry. The only way I'd do it is to make a deal with myself... if it goes upstream, I break it off.