What is California SB 253 and who does it apply to?

SB 253 is California's Climate Corporate Data Accountability Act, requiring companies with $1 billion or more in annual revenue that do business in California to publicly disclose Scope 1 and Scope 2 greenhouse gas emissions. The law uses the GHG Protocol as its required methodology. First reports are due August 10 of this year for Scope 1 and 2 data, with Scope 3 reporting requirements following in subsequent years.

What does GHG Protocol-aligned reporting mean for SB 253?

GHG Protocol is the internationally recognized standard for measuring and reporting greenhouse gas emissions. For SB 253, companies must calculate their Scope 1 and Scope 2 emissions using either the financial control or operational control consolidation approach defined by GHG Protocol. Choosing the right boundary for your organization is one of the first and most consequential decisions in building a compliant emissions inventory.

Does the rescission of the federal climate disclosure rule affect SB 253?

No. SB 253 is California state law and operates independently of any federal rulemaking. Companies that paused their sustainability reporting programs in anticipation of federal relief still face the California deadline. CARB has indicated enforcement discretion for good-faith first-year filers, but the August 10 deadline is not affected by federal action.

How does Europe's simplified ESRS connect to what U.S. companies need to do?

The finalized ESRS uses GHG Protocol-aligned methodology for emissions reporting — the same standard SB 253 requires. Companies building their carbon accounting infrastructure around GHG Protocol today are simultaneously positioning themselves for CSRD readiness if they have European operations or EU-headquartered customers. The frameworks are not identical, but the foundational data layer is shared.

What are the Scope 3 implications of the failed IMO shipping carbon framework?

Without a global maritime carbon standard, companies importing by sea face a growing patchwork of regional carbon pricing rules. EU ETS already covers international shipping; the UK is expanding coverage. This increases both the cost and complexity of Scope 3 Category 4 upstream transportation calculations. Companies should document their transport emissions methodology now, before regional rules create additional reporting obligations.

What is clean tech investment growth telling us about the energy transition?

Global energy transition investment reached $2.3 trillion in 2025, up 8% year over year, with solar, EVs, and grid spending leading. Combined with IRENA's confirmation that solar-plus-storage is now cost-competitive with fossil fuels on a 24/7 basis, the data signals that renewable energy is no longer a sustainability-premium decision — it's an increasingly standard capital allocation choice.

How should mid-market companies think about multi-jurisdictional sustainability reporting?

The most durable approach is to build your emissions inventory against the GHG Protocol standard first, then map it to the frameworks that apply to your specific jurisdictions and customer requirements. A GHG Protocol-aligned footprint can serve SB 253, inform CSRD readiness, and support CDP reporting, EcoVadis assessments, and SBTi target-setting — reducing the need to recollect and reformat data for each new requirement.

Amanda Grady

Trust Desk | AI governance is becoming table stakes for law firms
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Amanda Grady

Trust Desk | AI governance is becoming table stakes for law firms

Trust Desk | AI governance is becoming table stakes for law firms