1. AB1493. (2002). Californian assembly bill no. 1493, chapter 200: An act to amend section 42823 of, and to add section 43018.5 to, the health and safety code, relating to air quality. Sacramento: Approved by Governor, July 22.
2. AB32. (2006). Assembly bill no. 32, chapter 488: An act to add division 25.5 to the health and safety code, relating to air pollution. Sacramento: Approved by Governor, September 27.
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4. Adler, J. (2007). Can California catch a waiver? The golden state wants to make its own global-warming policy. National Review Online, May 24. http://article.nationalreview.com . Accessed 20 July 07.
5. AFX News Ltd. (2005). California voters reject Schwarzenegger measures in key referendum. Forbes Online, November 9. www.forbes.com . Accessed 6 March 08.