There definitely isn't a law saying you can't OC, but remember there isn't a law saying that you CAN OC. If he doesn't have a CCW he's going to run into some issues if he gets caught in/on a vehicle. I personally don't care to open carry, nor do I plan on it ever. I'll keep my firearm tucked away in my waist band. I just don't want anyone to know I have a firearm on me. I could see a number of things becoming a hassle.