Mont. Code Ann. § 37-43-308

If a person holding a license entitling the person to drill water wells or monitoring wells in another state applies for a Montana water well contractor's, water well driller's, or monitoring well constructor's license, the board may waive the apprenticeship requirements and examination requirements if it finds that the standards and requirements of the state in which the applicant is licensed are equal to or exceed those of Montana. However, the board may require the applicant to successfully complete an examination based on Montana statutes and rules relating to the drilling of water wells or monitoring wells in this state.