Mont. Code Ann. § 2-18-604

The department of administration or the administrative officer of any county, city, or political subdivision is responsible for the proper administration of the employee annual, sick, or military leave provisions and the jury duty provisions found in this part and may, when necessary, promulgate rules necessary to achieve the uniform administration of these provisions and to prevent the abuse of these provisions. When promulgated, the rules are effective as to all employees of the state or any county, city, or political subdivision of the state.