The PACT Act does affect shipping (like using age verification and specific carriers), but it also requires online sellers to register with the ATF and comply with state and local tax laws. That means you need to know what's legal in each state where you ship. California has its own flavor ban, for instance, so you can't ship flavored vapes (except tobacco flavor) to California addresses.

Also, the PACT Act requires you to keep records of all sales, including the buyer's age verification. This ties directly to your import documentation: if you can't prove a product came from a compliant source, you could face penalties.