California Code, Health and Safety Code - HSC § 108760

(a) Except as provided in subdivision (b), any toxic household product that contains any substance listed in subdivision (a) of Section 108765, and manufactured on and after January 1, 1992, and sold in California, shall include within the product a bittering agent that is nontoxic, in a concentration so as to render the product aversively bitter, unless the product is packaged with child-resistant safety closures in accordance with the federal Poison Prevention Packaging Act of 1970 (15 U.S.C. Sec. 1471 et seq.) and regulations adopted thereunder (16 C.F.R. 1700.1 et seq.).

(b) Any toxic household product that (1) is required to be registered with the Environmental Protection Agency under the Federal Insecticide, Fungicide, and Rodenticide Act (7 U.S.C. Sec. 135 et seq.), (2) is formulated for outdoor or food use economic poisons purposes, and (3) will be reformulated to include a bittering agent, shall comply with subdivision (a) no later than two years from the date when the Environmental Protection Agency has approved a bittering agent for use in outdoor or food use economic poisons.