20 ILCS 1807/7: Article 7. Apprehension.

(a) Apprehension is the taking of a person into custody.

(b) Any person authorized by this Code or by Chapter 47 of Title 10, United States Code, or by regulations issued under either, to apprehend persons subject to this Code, any marshal of a court-martial appointed pursuant to the provisions of this Code, and any peace officer or civil officer having authority to apprehend offenders under the laws of the United States or of a state, may do so upon probable cause that an offense has been committed and that the person apprehended committed it.

(c) Commissioned officers, warrant officers, petty officers, and noncommissioned officers have authority to quell quarrels, frays, and disorders among persons subject to this Code and to apprehend persons subject to this Code who take part therein.

(d) If an offender is apprehended outside this State, the offender's return to the area must be in accordance with normal extradition procedures or by reciprocal agreement.

(e) No person authorized by this Article to apprehend persons subject to this Code or the place where such offender is confined, restrained, held, or otherwise housed may require payment of any fee or charge for so receiving, apprehending, confining, restraining, holding, or otherwise housing a person except as otherwise provided by law.