Generally revise laws relating to exempt wells

This bill revises Montana water rights laws to clarify definitions related to exempt wells and groundwater management. It directly affects landowners, water users, and the Department of Natural Resources by updating how terms like "appropriation," "beneficial use," and "combined appropriation" are defined. The legislation provides clearer rules for groundwater projects, aquifer recharge, and instream flow protections, while establishing new rulemaking authority for the state department. These changes aim to modernize water rights terminology and improve consistency in how water withdrawals and uses are classified under state law.