what do you mean? Just because a motor is USPS ground shippable does not mean you can ship it, you are required to get a letter of exemption from the postmaster, or be included on a list by the manufacturer as a dealer lumped under their exemption letter. Those are the usps rules. Aerotech does not update their list to the usps ever afaik, when I personally talked to the postmaster, they did not have a list from quest, aerotech or RCS. They seemed to have something from estes but not sure how often they update it. I had to apply personally and get my own letter. For non usps ground shippable motors you are bound by the common carriers rules and hazmat requirements. Typically to mail hazmat through ups or fedex you have to take their multi day several hundred dollar course. There isn't a license.

Frank

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