Laws to protect Californians from DUI offenders, help establish an earthquake early warning system, reform the California Public Utilities Commission, increase oversight of building contractors, require police to securely stow any handgun left in a car, improve tour bus safety, crack down on water-guzzling households, and more take effect on January 1. The new laws are the result of 17 bills that were introduced by Senator Jerry Hill, passed by the Legislature and signed by Governor Jerry Brown in 2016.