United States · act
California Health & Safety Code §§44475–44475.3 (in force 1 Jan 2024)
Scope
Entities marketing/selling offsets in California and entities making Dictionary termNet zeroA state in which anthropogenic greenhouse-gas emissions are balanced by anthropogenic removals over a specified period and within a defined boundary.Read the full definition /carbon-neutral claims while operating in California
Penalties
Civil penalties up to $2,500 per day per violation (max $500k)
Last verified
2026-08-22
In plain language
Website-disclosure regime for Dictionary termCarbon offsetA carbon offset is the use of carbon credits or equivalent units to compensate for emissions that remain within a defined claim boundary.Read the full definition marketers (protocol, project details, Dictionary termDurabilityDurability is the extent to which a claimed climate or sustainability outcome is expected to last without being reversed, weakened or materially undermined over the relevant time horizon.Read the full definition , Dictionary termVerificationThe evidence-based confirmation that a claim about events, data or results already obtained is truthfully stated within defined criteria, scope and materiality.Read the full definition ) and for entities claiming net zero/carbon neutrality (methodology, offset details, progress, third-party verification).
Formal requirements
Reviewed provisions grouped by practical purpose. Use the official text for the full legal context.
Offset marketer disclosure — Website disclosure of protocol, project type, location, Dictionary termDurabilityDurability is the extent to which a claimed climate or sustainability outcome is expected to last without being reversed, weakened or materially undermined over the relevant time horizon.Read the full definition , independent Dictionary termVerificationThe evidence-based confirmation that a claim about events, data or results already obtained is truthfully stated within defined criteria, scope and materiality.Read the full definition .
HSC 44475.1 · instrument-level citationOffset purchaser/claimant disclosure — Entity making Dictionary termNet zeroA state in which anthropogenic greenhouse-gas emissions are balanced by anthropogenic removals over a specified period and within a defined boundary.Read the full definition /carbon-neutral claims must disclose how the claim was determined to be accurate, offset details, interim progress, third-party Dictionary termVerificationThe evidence-based confirmation that a claim about events, data or results already obtained is truthfully stated within defined criteria, scope and materiality.Read the full definition .
HSC 44475.2 · instrument-level citationCivil penalty up to $2,500 per day per violation; max $500k
HSC 44475.3 · instrument-level citationClaims
Search or filter the reviewed connections, then open one claim for its full market-by-market assessment.
AB 1305: website disclosure of methodology, offsets used, registry, protocol, third-party Dictionary termVerificationThe evidence-based confirmation that a claim about events, data or results already obtained is truthfully stated within defined criteria, scope and materiality.Read the full definition ; penalties to $2,500/day (cap $500k)
AB 1305 website disclosures; offsets quantified, not double-counted
Quantified net-negative balance; durable removal standard; CA website disclosures
Offset disclosure; avoid absolute 'Dictionary termNet zeroA state in which anthropogenic greenhouse-gas emissions are balanced by anthropogenic removals over a specified period and within a defined boundary.Read the full definition ' for single journey
Disclosures; avoid blanket neutrality wording
Competent evidence offsets represent real additional reductions; AB 1305 website disclosures for CA claimants.
Plan + offset disclosure; AB 1305 filings for CA.
Lifecycle quantification + offset disclosures.