CA AB1305

Business entities marketing or selling voluntary carbon offsets in California must disclose on their websites details about offset projects, including the protocol used, project location, timeline, emissions reductions/removal quantities, project type, standards met, durability period, third-party validation, and annual emissions data.

Sellers of voluntary carbon offsets must disclose accountability measures if projects are not completed or fail to meet projected emissions reductions, including actions taken if carbon storage is reversed or future emissions reductions do not materialize.

Entities purchasing voluntary carbon offsets and claiming net zero emissions, carbon neutrality, or significant emissions reductions must disclose the offset seller name, project identification, project type, protocol used, and whether independent third-party verification exists.

Entities making net zero, carbon neutral, or similar emissions claims must disclose how claims were determined accurate, how interim progress is measured, and whether independent third-party verification of company data exists.

Violations are subject to civil penalties of up to $2,500 per day per violation, with a maximum total penalty of $500,000, enforceable by the Attorney General or local prosecutors; all disclosures must be updated at least annually.