Relating to the production and ownership of brine.

HB 246 defines "brine minerals" (including bromine, lithium, magnesium, and sodium chloride) and establishes that landowners own these minerals beneath their property as real property, responsible for protecting other owners' rights. It amends the Water Code to define "brine" as subterranean liquids containing these minerals (excluding groundwater, oil, gas, and oil/gas waste) and creates a new reporting requirement for operators of brine mining wells and injection wells. The bill directly affects landowners, mineral extraction companies, and the Railroad Commission, which must adopt rules to regulate brine mining operations. This defines ownership and regulatory frameworks for brine mineral production without creating new financial programs or subsidies.