SB 253's 2027 Rules Take Shape: What CARB Previewed At Its July Workshop - JD Supra
CARB's July workshop previewed the 2027 rules under SB 253, indicating upcoming mandatory climate disclosure requirements for large businesses operating in California.
Aforeworn detected this change in the ESG & Climate Disclosure space on August 9, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. Large businesses operating in California that meet SB 253 thresholds (likely >$1B annual revenue, but exact thresholds not specified in the excerpt). should confirm how it applies to their specific situation before acting. There is a time constraint attached: Not specified in the excerpt; rules are expected to take effect in 2027, but exact compliance deadlines are yet to be determined.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors ESG & Climate Disclosure continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
CARB is developing rules for SB 253 that will require climate-related disclosures, including greenhouse gas emissions reporting, starting in 2027. The workshop previewed these rules, signaling the beginning of the rulemaking process.
Who it affects
Large businesses operating in California that meet SB 253 thresholds (likely >$1B annual revenue, but exact thresholds not specified in the excerpt).
What you must do
Monitor CARB's rulemaking progress and prepare to collect and report GHG emissions data, including scope 1, 2, and possibly scope 3 emissions, to comply with future disclosure requirements.
Deadline
Not specified in the excerpt; rules are expected to take effect in 2027, but exact compliance deadlines are yet to be determined.
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