Cal. Pub. Res. Code § 16001

For the purposes of this division, “recycled concrete” means reclaimed concrete material used in concrete mixtures in accordance with the “Greenbook Standard Specifications for Public Works” 2003 edition, or the most current revision of those requirements. “Recycled concrete” includes mix designs or aggregate gradations that are in accordance with specifications of the American Concrete Institute (ACI), the American Society of Testing and Materials (ASTM), the International Building Code (IBC), the International Residential Code (IRC), the Uniform Building Code (UBC), or Caltrans Standard Specifications. However, reclaimed concrete material that is in compliance with ASTM-94 specifications is exempt from this division.