Minn. Stat. § 182.675

Although not required, an employee or employer may seek to resolve any dispute arising under this chapter through resolution procedures provided by any applicable labor agreement or, if there is no applicable provision of a labor agreement, through a dispute resolution procedure to be developed by the commissioner. The employee is not deemed to have waived or lost any substantive or procedural rights under this chapter due to resort to the resolution methods and may pursue all legal remedies under this chapter without any prejudice due to the results of these resolution methods. Nothing in this chapter is deemed to prevent the creation of additional rights or remedies for employees pursuant to a labor agreement or personnel rule.