Montana StatutesPart 4. State Plan on Aging52-3-401. Definitions.52-3-402. Purpose.52-3-403. Existing planning and service areas grandfathered -- exception.52-3-404. State plan on aging.52-3-405. Designation of planning and service areas.52-3-406. Departmental rules.52-3-407. through reserved.52-3-410. Achieving accountability.