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Zwecks Alkohol steht dies beim US-Zoll:
Alcoholic Beverages
In addition to U.S. laws, the laws of the state in which you first arrive in the United States will govern the amount of alcohol you may bring with you, and whether you need a license. If you plan to bring alcoholic beverages with you, before you depart, you should contact the state’s applicable alcoholic beverage control board to determine what you need to do to comply with that state’s laws and regulations.