Section 922(o) of Title 18 makes it unlawful to transfer or possess a machinegun made after May 19, 1986. In addition, under the NFA, it is unlawful to manufacture or possess a machinegun without first registering it with the Secretary of the Treasury and paying applicable taxes. 26 U.S.C. §§ 5822, 5861. As a result of the enactment of 18 U.S.C. § 922(o), the Secretary of the Treasury no longer will register or accept any tax payments to make or transfer a machinegun made after May 19, 1986. Accordingly, because it is impossible to comply with the registration and taxation provisions in the NFA, prosecutors should charge the unlawful possession or transfer of a machinegun made after May 19, 1986 under § 922(o).