No idea.
You can check with Fish & Wildlife here:
http://www.nj.gov/dep/fgw/digfsh.htm
Poaching stocked trout is just the way it is in NJ. I go to Seeley's Pond on opening day and never fail to catch trout whose stomachs are full of corn and powerbait or even have hooks in the mouths. Fishing had only legally begun minutes before I caught them, so it's unlikely they got that full that morning.
A bunch of years ago (I can't remember when) almost ALL the trout were poached before opening day. The anglers surrounding that lake almost had a riot. I complained to the Conservation Officer there checking licenses and he just said they can't be everywhere at once.