(a) Upon designation by the Administrator of the Environmental Protection Agency, any law enforcement officer of the Environmental Protection Agency with responsibility for the investigation of criminal violations of a law administered by the Environmental Protection Agency, may
(1) carry firearms;
(2) execute and serve any warrant or other processes issued under the authority of the United States; and
(3) make arrests without warrant for
(A) any offense against the United States committed in such officers presence; or
(B) any felony offense against the United States if such officer has probable cause to believe that the person to be arrested has committed or is committing that felony offense.
