Minn. Stat. § 179.135
No employer holding a valid collective bargaining agreement with any labor organization recognized or certified by the commissioner of mediation services or the National Labor Relations Board as the accredited bargaining representative for the employees or any group of employees of such employer shall be required to enter into negotiations with any other labor organization respecting the employees covered by the existing union agreement, so long as the existing agreement remains in full force and effect in accordance with its terms except where a successor labor organization has been certified as the representative of the employees covered by such agreement by the commissioner of mediation services or the National Labor Relations Board and recognized by the employer.
The violation of the provisions of this section by any officer, business agent, employee or other representative of any labor organization is prohibited.
Minn. Stat. § 179.135
1947 c 593 s 1,2; 1969 c 1129 art 2 s 10; 1987 c 186 s 15