Minn. Stat. § 97C.305: TROUT-AND-SALMON STAMP VALIDATION.

Subdivision 1. Requirement.

Except as provided in subdivision 2 or section 97A.405, subdivision 2, a person over age 18 and under age 65 required to possess an angling license must have a trout-and-salmon stamp validation to:

(1) take fish by angling in:

(i) a stream designated by the commissioner as a trout stream;

(ii) a lake designated by the commissioner as a trout lake; or

(iii) Lake Superior; or

(2) possess trout or salmon taken in the state by angling.

Subd. 2. Exception.

A trout-and-salmon stamp validation is not required to take fish by angling or to possess trout and salmon if:

(1) the person:

(i) possesses a license to take fish by angling for a period of 24 hours or 72 hours from the time of issuance under section 97A.475, subdivision 6, clause (4) or (5); or 7, paragraph (a), clause (3) or (5); and

(ii) is taking fish by angling, or the trout or salmon were taken by the person, during the period the license is valid;

(2) the person is taking fish, or the trout or salmon were taken by the person, as authorized under section 97C.035; or

(3) the person has a valid license issued under section 97A.441, subdivision 1, 2, 3, 4, or 5.