For the purposes of sections 559b to 559f of this title, if specifically designated by the Secretary and specially trained, not to exceed 1,000 special agents and law enforcement officers of the Forest Service when in the performance of their duties shall have authority to—

(1) carry firearms;

(2) conduct, within the exterior boundaries of the National Forest System, investigations of violations of and enforce section 841 of title 21 and other criminal violations relating to marijuana and other controlled substances that are manufactured, distributed, or dispensed on National Forest System lands and to conduct such investigations and enforcement of such laws outside the exterior boundaries of the National Forest System for offenses committed within the National Forest System or which affect the administration of the National Forest System (including the pursuit of persons suspected of such offenses who flee the National Forest System to avoid arrest);

(3) make arrests with a warrant or process for misdemeanor violations, or without a warrant or process for violations of such misdemeanors that any such officer or employee has probable cause to believe are being committed in his presence or view, or for a felony with a warrant or without a warrant if he has probable cause to believe that the person to be arrested has committed or is committing such felony, for offenses committed within the National Forest System or which affect the administration of the National Forest System;; ¹

(4) serve warrants and other process issued by a court or officer of competent jurisdiction;

(5) search with or without warrant or process any person, place, or conveyance according to Federal law or rule of law; and

(6) seize with or without warrant or process any evidentiary item according to Federal law or rule of law.