Duty-free status primarily applies to which type of purchases?

Duty-free status primarily applies to products purchased from international airports and seaports because these items are sold to travelers who are leaving the country and are often exempt from local taxes and duties. This is designed to encourage tourism and provide travelers with the opportunity to buy goods without the added costs of domestic taxation. The duty-free allowances are typically regulated by customs authorities, allowing travelers to bring these goods back into their home country without incurring customs duties, as long as they meet certain criteria.

The other options do not generally involve duty-free purchases. Local grocery store purchases and items bought from domestic retailers are subject to local tax regulations. Online purchases from international sellers might be exempt from sales tax in some jurisdictions, but they typically do not carry duty-free status in the same way as goods purchased at specified duty-free shops in airports and seaports.