Re: articulated flies in multiple fly, catch and release areas?
Here in MD we have similar regs, and "single hook" means "single point". This mean trebles, doubles or flies with more than one hook incorporated into the fly are not legal. However, it does not mean multiple flies cannot be used, but there is a regulation that limits the number of hooks to 2. So, two single hook flies are legal as long as they're separated as Rip Tide suggested.
I would have to agree too with jaybo, contact the folks who enforce the laws & get their interpretation, in writing!
Or, stick with the one, single hook, barbless fly & not worry about the gray area.
Remember, no one likes to be behind the big truck, but that's better than being under it!