CA Pub Res Code Section 42921

(a)

Each state agency and each large state facility shall divert at least 25 percent of all solid waste generated by the state agency by January 1, 2002, through source reduction, recycling, and composting activities.

(b)

On and after January 1, 2004, each state agency and each large state facility shall divert at least 50 percent of all solid waste through source reduction, recycling, and composting activities.