Minn. Stat. § 325E.24: FURNISHING OF SPACE; EXCEPTIONS.

Subdivision 1. Unlawful discrimination prohibited.

It is unlawful for any person engaged in the business of outdoor advertising to directly or indirectly discriminate on the basis of race, color, creed or political affiliation in the furnishing of advertising or advertising service or space for advertisements on advertising devices. This shall not be construed as making mandatory the assignment of space immediately adjacent to previously leased space for the promotion of conflicting services or ideas.

Subd. 2. Limits on duty to furnish.

The person engaged in the business of outdoor advertising does not have to accept a request for advertising space from any person not willing to pay the prescribed rates or charges and the advertising of any material prohibited by law.