T-24 History:
History of the Energy Standards
1975
The Warren-Alquist State Energy Resources Conservation and Development Act was based on a legislative finding that the rapid growth rate in the demand for electric energy was in part due to wasteful, uneconomic, inefficient, and unnecessary uses of power.
The Legislature also found there was a pressing need to accelerate research and development of alternative sources of energy. This policy resulted in a situation where more than 20 agencies, ranging from the Barbers' Licensing Board to the State Architect, can adopt building standards and publish them in the separate titles of the California Administrative Code (renamed in 1988 to the California Code of Regulations).
1979
SB 331 (Chapter 1152, Statutes of 1979) provided the California Building Standards Commission (CBSC) with broader powers. As a result, all proposed building standards regulations adopted by various state agencies must be reviewed and approved by CBSC, in accordance with the Administrative Procedure Act (Government Code Section 11346 et seq.) and the “nine point criteria” (Health and Safety Code Section 18930), before the regulations have any force or effect. Further, the bill required all building standards to be removed from other titles of the California Administrative Code (renamed in 1988 to the California Code of Regulations) and placed into a single code CBSC is responsible for codifying and publishing—Title 24.
For further reading of the history:
https://www.dgs.ca.gov/BSC/About/History-of-the-California-Building-Standards-Commission
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Access to the California Energy Efficiency Standards: