Scope
Entities marketing/selling offsets in California and entities making net-zero/carbon-neutral claims while operating in California
United States · act
California AB 1305 — Voluntary Carbon Market Disclosures Act
California Health & Safety Code §§44475–44475.3 (in force 1 Jan 2024)
In forceApplies 2024-01-01
Penalties
Civil penalties up to $2,500 per day per violation (max $500k)
Last verified
2026-08-22
In plain language
What this law does
Website-disclosure regime for carbon-offset marketers (protocol, project details, durability, verification) and for entities claiming net zero/carbon neutrality (methodology, offset details, progress, third-party verification).
Core obligations
Annual website disclosures by offset marketers and net-zero claimants
Dictionary
Terms defined in this law
- Offset marketer disclosureHSC 44475.1
- Offset purchaser/claimant disclosureHSC 44475.2
- PenaltyHSC 44475.3
Claims