Minn. Stat. § 626.862: POWERS OF LAW ENFORCEMENT OFFICERS.

Except as specifically provided by statute, only a peace officer and part-time peace officer may:

(1) issue a citation in lieu of arrest or continued detention unless specifically authorized by ordinance;

(2) ask a person receiving a citation to give a written promise to appear in court; or

(3) take a person into custody as permitted by section 629.34.