Saint Paul, Minn., Legis. Code ch. 183 § 183.10

It is an unfair discriminatory practice for any employer, labor organization, employment agency, public accommodation, public service, educational institution, or owner, lessor, lessee, sublessee, assignee or managing agent of any real property, or any real estate broker, real estate salesperson or employee or agent thereof, or any other person to intentionally engage in any reprisal against any person because that person: (1)
Opposed a practice forbidden under this chapter or has filed a charge, testified, assisted or participated in any manner in an investigation, proceeding or hearing under this chapter; or
(2) Associated with a person or group of persons who have filed a charge under this chapter; or
(3) Associated with a person or group of persons who are disabled or who are of different race, color, creed, religion, national origin, ancestry, sex, sexual or affectional orientation, familial status, marital status, or status with regard to public assistance.
A reprisal includes, but is not limited to, any form of intimidation, retaliation or harassment. It is a reprisal for an employer to do any of the following with respect to an individual because that individual has engaged in the activities listed in clause (1), (2) or (3); refuse to hire the individual; depart from any customary employment practice; transfer or assign the individual to a lesser position in terms of wages, hours, job classification, job security or other employment status; or inform another employer that the individual has engaged in the activities listed in clause (1), (2) or (3).