Minn. Stat. § 181.952
Subd. 1. Contents of the policy.
An employer's drug and alcohol testing policy must, at a minimum, set forth the following information:
Subd. 2. Notice.
An employer shall provide written notice of its drug and alcohol testing policy to all affected employees upon adoption of the policy, to a previously nonaffected employee upon transfer to an affected position under the policy, and to a job applicant upon hire and before any testing of the applicant if the job offer is made contingent on the applicant passing drug and alcohol testing. An employer shall also post notice in an appropriate and conspicuous location on the employer's premises that the employer has adopted a drug and alcohol testing policy and that copies of the policy are available for inspection during regular business hours by its employees or job applicants in the employer's personnel office or other suitable locations.