Here in Jersey we are required by state law to be a registered Nitrous Handler. I needed to file for a permit to carry, transport and even fill Nitrous Bottles, I do have my N.J. State Permit so I have no troubles anywhere getting my bottles filled. I have found some places check for this permit and some do not, I wanted to play it safe- as ya never know when the law will pull you over so in the event of Nitrous bottles being spotted- I can easily open my wallet and hand the law my state permit and they can't do a thing to me- I'm authorized.... The $3.00 per lb is about right give or take a few cents.....