The proposed bill, known as the "Subsurface Pore Space Act," aims to clarify the ownership and conveyance rights associated with subsurface pore space in Michigan. It establishes that the ownership of pore space beneath surface lands and waters is vested in the owner of the overlying surface property, unless it has been severed from the surface estate. The bill defines key terms such as "confining zone" and "pore space," and outlines the conditions under which pore space can be conveyed, reserved, or leased. It specifies that any conveyance of surface property includes the pore space unless explicitly excluded, and that severed pore space interests can be sold or leased independently.

Additionally, the bill ensures that it does not limit existing common law rights related to mineral estates or the surface owner's rights to use nonsevered pore space for fluid or gas storage. It also protects previously acquired rights to pore space that were established before the bill's enactment. The act will only take effect if certain other bills from the 103rd Legislature are also enacted into law.