Just now seeing this from the ATF.
140-AA89: Interstate Transport and Temporary Export of National Firearms Act - NPRM
ATF is proposing to update the administrative process for transporting lawfully registered National Firearms Act (NFA) firearms within the United States. Under the proposal, individuals transporting NFA firearms for short-term purposes (365 days or fewer) would no longer be required to submit advance notice to ATF or await approval before departing. Individuals transporting NFA firearms for long-term purposes (more than 365 days) or permanent relocation would still submit notice but would not need to await ATF approval before transporting. This change to ATF Form 5320.20 (Form 20), per 27 CFR § 478.28, is intended to remove an unnecessary regulatory burden on law-abiding NFA firearm owners without affecting applicable federal, state, or local legal requirements.