Countdown to Compliance: California, EU, & GHG Protocol Update

The global climate disclosure landscape is changing – are you ready?

Learn how the recent regulatory decisions impact sustainability reporting timelines for businesses in our latest blog here.

California’s climate disclosure rules continue to evolve rapidly. While SB 253 remains in effect, the Ninth Circuit Court of Appeals has issued a preliminary injunction temporarily pausing SB 261, meaning the climate-related financial risk disclosure requirement is on hold while litigation proceeds.

SB 253 applies to companies who do business in California with $1B+ in global revenue, requiring Scope 1 and 2 emissions reporting beginning in 2026 and Scope 3 in 2027. 

SB 261, which would have required companies who do business in California with $500M+ in revenue to publish a climate-related risk report on their website by January 1st, 2026 is temporarily halted pending further court decisions.

Beyond California, the EU Omnibus reforms are reshaping CSRD, CBAM, and CSDDD, shifting thresholds, timelines, and expectations for both EU and U.S. businesses. Meanwhile, the GHG Protocol is updating its Scope 2 Guidance for the first time in over a decade. These standards are foundational for how companies report and set goals for GHG emissions.

Corporate climate disclosure is no longer optional despite submission deadline delays. Whether your company is directly in scope or part of a global supply chain, preparation is key. Data collection, assurance planning, and governance updates can take months, and regulatory shifts make proactive readiness even more important.

Watch the Webinar: What the Changes Mean and How to Prepare

Our recent virtual discussion brought together experts from Trio and the California Air Resources Board (CARB) to help you navigate this fast-moving environment.

Download the recording for a strategic briefing covering what’s changed and what to expect next.

What we covered:

• California SB 253 & SB 261: Who is in scope, what the latest court developments mean, and updates on CARB’s rulemaking
• EU Omnibus Simplification: Impacts on CSRD, CBAM, and CSDDD for EU and global companies
• GHG Protocol Revisions: What’s under review and how potential changes affect emissions accounting
• How to get ready: Practical steps for data readiness, assurance, and governance alignment