In restraint of business void — Exceptions
A contract by which anyone is restrained from exercising a lawful profession, trade, or business of any kind is to that extent void, except:
1. A person that sells the goodwill of a business and the person’s partners, members, or shareholders may agree with the buyer to refrain from carrying on a similar business within a reasonable geographic area and for a reasonable length of time, if the buyer or any person deriving title to the goodwill from the buyer carries on a like business in that area.
2. Partners, members, or shareholders, upon or in anticipation of a dissolution of a partnership, limited liability company, or corporation; upon or in anticipation of a dissociation of a partner or member; or as part of an agreement addressing the dissociation or sale of a partner, member, or shareholder’s ownership interest, may agree that all or any number of them will not carry on a similar business within a reasonable geographic area where the partnership, limited liability company, or corporation business has been transacted, or within a specified part of the area.
See https://ndlegis.gov/general-information/north-dakota-century-code/index.html