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Simpson Thacher Sustainability And ESG: Regulatory Update – August 2026
On July 21, CARB hosted a public workshop to clarify the near-term implementation path for SB 253, focusing on reporting deadlines, phased Scope 3 reporting, insurance-company treatment, and assurance. During the workshop, CARB introduced a new initial reporting deadline of November 10, 2026 for Scope 1 and Scope 2 emissions reporting, and discussed phased-in Scope 3 reporting beginning in 2027. CARB also signaled that future rules will rely heavily on the GHG Protocol, including disclosures on methodology, boundaries, emissions factors, data sources, and global warming potential values, and previewed expected future application of the climate reporting laws to insurance companies.
Simpson Thacher & Bartlett LLP
