California Code of Regulations (CCR) — Proposition 65

The California Code of Regulations (CCR) contains the implementing regulations for Proposition 65 in Title 27 (Environmental Protection), Division 4 (Safe Drinking Water and Toxic Enforcement Act of 1986), Chapter 6 (Clear and Reasonable Warnings), Sections 25600–25900. These regulations define: the criteria for a ‘clear and reasonable warning’ (Article 6); safe harbor warnings for consumer products (Articles 6 and 6.1); safe harbor warnings for specific exposure scenarios (e.g., food, dietary supplements, passenger vehicle parts, recreational marine vessel parts under new §§25607.50–25607.53, effective January 1, 2025); listing mechanisms (Article 3); and safe harbour levels (Article 7). Title 11 CCR Chapter 4 governs private enforcement reporting requirements.

Title 27, CCR, §§25600–25900 (OEHHA Proposition 65 regulations); Title 11, CCR, Chapter 4 (AG private enforcement regulations); amended December 6, 2024 (effective January 1, 2025).

Manufacturers, importers, distributors, and retailers must comply with Title 27 CCR warning regulations to establish a safe harbour defence against Proposition 65 enforcement. The December 2024 amendments (effective January 1, 2025) significantly updated the short-form warning requirements (new §§25603 and 25607.2) and added new tailored safe harbour warnings for motor vehicle parts (§25607.50), recreational marine vessel parts (§25607.51), facilities handling such parts (§25607.52), and food short-form warnings (§25607.53). Compliance teams must track ongoing CCR amendments.