; (B) outside a patrol vehicle whenever— (i) a Federal law enforcement officer assigned that patrol vehicle is conducting an enforcement or investigative stop; (ii) patrol vehicle emergency lights are activated or would otherwise be activated if not for the need to conceal the presence of law enforcement; or (iii) an officer reasonably believes recording may assist with prosecution, enhance safety, or for any other lawful purpose; and (C) inside the vehicle when transporting an arrestee or when an officer reasonably believes recording may assist with prosecution, enhance safety, or for any other lawful purpose. (3) Requirements for recording (A) In general A Federal law enforcement officer shall begin recording for an enforcement or investigative stop when the officer determines an enforcement stop is necessary and shall continue until the enforcement action has been completed and the subject of the enforcement or investigative stop or the officer has left the scene. (B) Activation with lights A Federal law enforcement officer shall begin recording when patrol vehicle emergency lights are activated or when they would otherwise be activated if not for the need to conceal the presence of law enforcement, and shall continue until the reason for the activation ceases to exist, regardless of whether the emergency lights are no longer activated. (C) Permissible recording A Federal law enforcement officer may begin recording if the officer reasonably believes recording may assist with prosecution, enhance safety, or for any other lawful purpose