The California Air Resources Board (CARB) is in the process of updating rules for its Low Carbon Fuel Standard (LCFS), to align with the state’s climate goals, embrace technological advancements, and respond to stakeholder feedback. The latest changes were detailed in the Second 15-Day Notice, which was released on October 1, 2024. This notice builds on a previous proposals and public input, emphasizing increased flexibility, transparency, and market stability.
To understand the progression of these amendments, here’s a timeline of key events:
The Second 15-Day Notice introduces updates and modifications that help clarify and refine several proposals introduced in the First 15-Day Notice. Below are some of the key changes:
Hydrogen Production and Renewable Content Requirements
Credit Limitations on Virgin Crop-Based Biofuels
While sunflower oil has been added, the other key change has been on timeline. While earlier we had anticipated that RD would slow down in the near term, our new assessment is that it would not.
Soybean Oil, Canola Oil and Sunflower oil (reported as a component of ‘Other feedstock’ in CARB’s quarterly reports), has already crossed 20% for 2 years at an aggregate level. And in some quarters Soybean sourced RD alone has exceeded 20% of the RD produced. Over the next 3 years we will see a change/ shift in how RD is supplied into California. We will also have to see if other jurisdictions adopt a similar stance.

Annual Carbon Intensity Benchmarks
Changes to Hydrogen Refueling Infrastructure (HRI) Credits
Electric Distribution Utilities (EDUs) Credit Allocation and Spending
OEM Credit Allocation and Revocation
Verification Thresholds for Hydrogen and Electricity Transactions
RNG Crediting Periods
RNG Book-and-Claim Accounting
Public Data Availability for ZEV Infrastructure
Verification Flexibility for Site Visits
Verification Delay for Hydrogen and Electricity Transactions
Both notices confirm that proposed modifications do not lead to significant new environmental impacts. The Second 15-Day Package includes new supporting documents such as instruction manual for soeme Tier 1 CI Calculators . These calculators will aid in determining carbon intensity values accurately while ensuring adherence to regulatory standards.
In summary, the Second 15-Day Notice introduces refinements to the previously proposed changes, several of which are based on public feedback. In several cases it provides flexibility to the program participants, and in a few cases it clarifies requirements that were announced earlier. Besides RNG pathway crediting provisions, most of the material changes were all captured in the first 15-day package.
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