No person, other than a “law-enforcement officer” as defined by § 222 of Title 11 or an employee of any state court acting at the direction of any judge, commissioner or master of any state court, shall apprehend or detain a suspected fugitive on behalf of another person, including a principal on a bond, who has been released on bail as required by the terms of a bond or the bond has been revoked by court order, unless that person is licensed by the provisions of this chapter and its rules and regulations.