not sure what the laws are in Jersey - but here in PA as long as you have a valid drivers license you can ride alone with a permit.
I know in NY that you need to ride with someone (or at least it used to be that way back when i lived there) so maybe thats how it is there....
I think if he has a valid DL i think all he will get is a ticket...no biggie. But obviously his best bet would be to ride with someone if thats the law there. He should look into the Motorcycle saftey course. In PA if you take it and pass you automatically get your MCL
just my two cents for what its worth