28 CFR 2.46 - Execution of warrant and service of summons.
(a) Any officer of any Federal correctional institution or any Federal officer authorized to serve criminal process within the United States, to whom a warrant is delivered shall execute such warrant by taking the parolee and returning him to the custody of the Attorney General.
(b) On arrest of the parolee the officer executing the warrant shall deliver to him a copy of the Warrant Application listing the charges against the parolee, the applicable procedural rights under the Commission's regulations and the possible actions which may be taken by the Commission.
(c) If execution of the warrant is delayed pending disposition of local charges, for further investigation, or for some other purpose, the parolee is to be continued under supervision by the probation officer until the normal expiration of the sentence, or until the warrant is executed, whichever first occurs. Monthly supervision reports are to be submitted, and the parolee must continue to abide by all the conditions of release.
(d) A summons to appear at a preliminary interview or revocation hearing shall be served upon the parolee in person by delivering to the parolee a copy of the summons. Service shall be made by any Federal officer authorized to serve criminal process within the United States, and certification of such service shall be returned to the appropriate regional office of the Commission.