Posted on Tuesday, November 18, 2025

The California Air Resources Board (CARB) held a third workshop regarding SB 253 and SB 261, their climate disclosure rules. During the workshop they noted that they had posted updates to their:

Slides from the workshop are available here and a video replay can be watched here. Key points made during the workshop:

  • First year SB 253 reporting for Scope 1 and 2 emissions will need to be made on or before August 10, 2026
  • The spreadsheet template that CARB provided for GHG emissions is optional for 2026 reporting and companies can submit existing GHG emissions reports prepared for others that also cover Scope 1 and Scope 2 reporting
  • Companies that have not been collecting GHG emissions data and are not planning to collect data, are not expected to submit Scope 1 and 2 reports in 2026 (they must submit an explanatory letter to CARB)
  • Assurance is not required for the first year 2026 reporting (although if the company has it and wishes to report it, they can do so)
  • Staff will be working on a subsequent rulemaking in 2026 to address program requirements in 2027 and other topics including reporting format and data assurance requirements

 

 



Upcoming XBRL US Events

Communications & Services Steering Committee Meeting
Tuesday, April 21, 2026

Domain Steering Committee Meeting
Tuesday, April 21, 2026

States Step In: Corporate Climate Reporting
Tuesday, April 21, 2026

Standard Government Reporting Work Group Meeting
Tuesday, April 28, 2026

Accounting, AI, And Automation: Preparing for the Future of Finance
Tuesday, May 5, 2026

Reporting Modernization Work Group Meeting
Tuesday, May 12, 2026

AI and Structured Data Forum: Optimizing Performance
Friday, May 15, 2026

Center for Data Quality Committee Meeting
Thursday, June 25, 2026