Revise term length of conservation easements

SB 209 limits conservation easements to a maximum term of 40 years (previously allowing perpetual terms), amending Montana law to require renewal for additional periods. It directly affects landowners who use conservation easements, prohibiting restrictions on agricultural activities for lands used for farming within the past decade and banning land conversion to federal control under such easements. Key provisions include revising definitions of "conservation easement" and "open-space land," and ensuring property tax assessments reflect the land's restricted use without lowering valuation. The bill does not change existing permitted easement restrictions (like limiting construction or development) but adds specific protections for agricultural use and landowner control.