; Use-of-Force Review Boards; decertification of officers (a) Notwithstanding any other provision of law, no State or unit of local government shall be eligible to receive funding under part E of title I of the Omnibus Crime Control and Safe Streets Act of 1968 ( 42 U.S.C. 3750 et seq.) unless that State or unit of local government has adopted a use-of-force training policy that, in substantial effect and at a minimum, trains officers to adhere to the following standards and permits— (1) use of objectively reasonable and proportionate force only to effect arrest, to prevent escape, or to overcome resistance; (2) use of deadly force only when the officer has an objectively reasonable belief, based on the totality of the circumstances that such force is necessary to— (A) defend against an imminent threat of death or serious bodily injury to the officer or to another person who is not the subject of the use of deadly force; (B) apprehend a fleeing person for any suspected felony that threatened or resulted in death or serious bodily injury, if the officer reasonably believes that the person will cause imminent death or serious bodily injury to another person who is not the subject of the use of deadly force, unless immediately apprehended; (C) where feasible, the officer shall, prior to the use of deadly force, make reasonable efforts to identify themselves as a law enforcement officer and to warn that deadly force may be used, unless the officer has objectively reasonable grounds to believe the person is aware of those facts; and (D) law enforcement officers observing an encounter where they have reason to believe, based on the totality of the circumstances, that a violation of the use of the agency’s use of deadly force policy is occurring have a duty to intervene in order to prevent the use of deadly force in violation of the agency’s policy