The California Energy Commission (CEC) and all the agencies that create building codes – HCD, DGS, SFM, BSC, ARB, OSHPD – are hammering out code wording and requirements for all trades, all building types, all climate zones and all counties.

Keep up to date on what is being planned by checking out their website and subscribing to emails.  http://www.energy.ca.gov/title24/2019standards/prerulemaking/