我现在是resident.
我想买一些医疗器械online。但是online卖家say
"The sale of this item may be subject to regulation by the U.S. Food and
Drug Administration and state and local regulatory agencies. If the item is
subject to FDA regulation, I will verify your status as an authorized
purchaser of this item before shipping of the item."
什么是FDA authorized purchaser?
怎样才能是authorized purchaser?
thanks