I do not recall. Honestly, in all my travels, only one guy at an ACE told me NO. I simply showed him his did not have a certification/ inspection on it either and he shrugged, chuckled, scratched his head, and then said, "Well, guess, your right. These Aluminum tanks are a little different. There aren't certs on them. Your not the 'LAW' are you? Trying to get me in trouble? Heck, you just want to get out of here and go camping it looks like. Them are out of state tags. Ok, give me 5 min and pay the guy at the desk inside. I'll radio it in."
4.xx gallons later and I was out of there back on the off beaten paths of the deserts.