parties to the transfer: executed under penalties of perjury both parties must reside in the same state as the individual pay a $200 transfer tax to ATF the application must include detailed information on the firearm and the parties to the transfer the transferee must certify on the application that he or she is not disqualified from possessing firearms on grounds specified in law the transferee must submit with the application (1) two photographs taken within the past year; and (2) fingerprints the transferee must submit with the application (3) a copy of any state or local permit or license required to buy, possess, or acquire machine guns an appropriate (local) law enforcement official must certify whether he or she has any information indicating that the firearm will be used for other than lawful purposes or that possession would violate state or federal law the transferee must, as part of the registration process, pass an extensive Federal Bureau of Investigation criminal background investigation. If ATF denies an application, it must refund the tax. Gun owners must keep approved applications as evidence of registration of the firearms and make them available for inspection by ATF officers. "Safe passage" provision One of the law's provisions (codified in section 926A of title 18 of the U.S. Code) was that persons traveling from one place to another have a defense for any state firearms offense in a state that has strict gun control laws if the traveler is just passing through (short stops for food and gasoline), provided that the individual is not otherwise prohibited from possession of a firearm, the firearms and ammunition are not readily accessible, that the firearms are unloaded and, in the case of a vehicle without a compartment separate from the driver's compartment, the firearms are located in a locked container other than the glove compartment or console. Whether or not this section protects air travel is disputed. Definitions of certain terms in the law include: Transporting. Not staying for any determined length of time. Passing through on the way to some place. Unloaded. No ammunition in the firearm. In the case of McDaniel v. Arnold, the courts upheld a conviction based on the interpretation that the accused had a loaded firearm despite not having a round in the chambered position. Not readily accessible. There are no clear court decisions or interpretations available but this term is widely regarded