I stopped at the local small independent outdoor shop the other day and asked the owner about new regulations and he had not heard about any new rules and he had just received a new shipment of canisters. He did say that there have been different rules for the the bigger canisters for some time already. I was going to buy a stock of canisters if they were going to be a problem in the future but he advised me to just buy them as needed. He said that he would let m know if he found that there was a problem.