Senate Bill 4 (Sen. Fran Pavley) (US California) has passed the Senate and awaits Assembly floor vote (California legislature) (source: The Sacramento Bee).
Per The Sacramento Bee – this Bill if enacted would have energy companies inform communities of planned tracking projects, mandate greater disclosure on the chemicals to be used, and put in place a permitting system for tracking (triggering the type of environmental review associated with conventional oil & gas wells that currently require permits).
See here for The Sacrameto Bee update on developments, note the link to a parallel court action further down on the webpage.