CAL Green is the first-in-the-nation mandatory green building standards code. Section 5.409 of the 2017 Intervening Code Supplements details a pathway to compliance through Life Cycle Analysis. In 2007, the California Buildings Standards Commission developed green building standards in an effort to meet the goals of California’s landmark initiative AB 32, which established a comprehensive program of cost-effective reductions of greenhouse gases (GHG) to 1990 levels by 2020.