; or (ii) other existing factors that suggest that the individual could potentially create a risk to public safety or significant risk of suicide. (E) Notice of determination If a court finds an individual is unsuitable to possess a Federal firearm owner's license, the court shall notify the applicant in writing, setting forth the specific reasons for such determination. (6) Review A determination of the Director of the Bureau of Alcohol, Tobacco, Firearms and Explosives or a district court of the United States under this subparagraph may be appealed to the appropriate court of the United States. (d) Exceptions (1) Previously possessed firearms Subsection (a) shall not apply to the possession of any firearm or ammunition by an individual who otherwise lawfully possessed the firearm or ammunition under Federal law on the date on which the Attorney General begins issuing Federal firearm owner's licenses under this section. (2) State licenses (A) In general Subsection (a) shall not apply to an individual in a State if the Attorney General determines that the State— (i) has in effect a process for issuing a State firearm owner's license to eligible individuals in the State that is substantially similar to the requirements of subsection (b)