Emissions & Vehicle Regulations
States adopting CARB vehicle standards under Section 177
Minimum ZEV sales share required from MY 2026 under ACC II
Heavy-duty NOx standard under Omnibus Low NOx (2024+ engines)
Regulation Overview
The California Air Resources Board is the most influential sub-federal environmental regulator in the world. Under a unique Clean Air Act waiver, CARB sets vehicle emissions standards stricter than federal EPA requirements—and 17+ states have adopted those standards under Section 177.
For supply chain and compliance teams, CARB compliance is not one program. It is a portfolio of obligations covering light-duty ZEV sales mandates (ACC II), medium- and heavy-duty truck ZEV sales (ACT), fleet transition requirements (ACF), heavy-duty engine NOx limits (Omnibus), low carbon fuel standards (LCFS), formaldehyde emission limits for composite wood products (ATCM), and VOC content limits for consumer products.
CARB compliance requires product-level and supplier-level evidence—emission test results, certification records, compliance reports, and third-party certifier documentation—across programs with different timelines and enforcement mechanisms. Multi-tier supply chain transparency is essential when component suppliers provide engines, fuel systems, or materials subject to CARB standards.
Key Components / Sub-Frameworks
Vehicle manufacturers selling light-duty vehicles in California and Section 177 states (ACC II)
Truck manufacturers selling Class 2b-8 vehicles in California (ACT)
State and local government fleet operators in California (ACF, post-October 2025 amendments)
Engine manufacturers certifying heavy-duty engines to CARB standards (Omnibus Low NOx)
Fuel producers and importers in California (LCFS)
Manufacturers, importers, and distributors of composite wood products sold in California (ATCM)
Key Thresholds
CARB is not one regulation—it is a portfolio of 10+ distinct programs. Your automotive division needs ACC II compliance. Your fleet operations need ACF documentation. Your materials team needs ATCM certifications. Your fuel supply chain needs LCFS reporting. Each program has separate rules, timelines, and reporting systems. No single team owns it. No single system tracks it.
California adopts a standard. Within months, 17+ states follow under Section 177. Your compliance obligation multiplies overnight—but each state's adoption timeline, start year, and enforcement posture differs. One OEM customer in New York needs ACC II evidence. Another in Massachusetts needs ACT documentation. Your compliance team is managing state-by-state variations manually.
CARB programs require third-party certifications, emission test reports, executive orders, and compliance labels. Your Tier 1 supplier provides an engine certified to CARB standards—but the certification applies to the prior model year. The MY 2024+ Omnibus Low NOx standard tightened. Without current, validated certification evidence at the component level, your finished product cannot demonstrate CARB compliance.
ACC II and ACT both use credit systems with banking, pooling, trading, and expiration rules. Credits earned in California can be pooled to Section 177 states—but with declining caps. PHEV values differ from BEV values. Environmental justice credits have separate criteria. Tracking credit balances across states, model years, and vehicle types without a centralized compliance data backbone is unsustainable.
Certivo In Action
Certivo in Action — CARB Workflow
From Manual Certification Tracking to Automated Validation
CORA collects and validates supplier CARB certifications automatically. Your team focuses on strategic decisions—not chasing expired executive orders and model year mismatches across 17+ states.
OEM Compliance Package Acceleration
Generate complete, audit-ready CARB compliance packages in hours—not the 4–6 weeks of manual compilation across suppliers, programs, and jurisdictions.
Proactive CARB Compliance Monitoring
When CARB adopts new standards, amends existing programs, or Section 177 states update adoption timelines, Certivo reassesses your portfolio instantly. Know your exposure before OEMs ask.
Key Statistics
Frequently Asked Questions
Which companies must comply with CARB regulations?
CARB compliance depends on the program. ACC II applies to manufacturers selling 4,500+ light-duty vehicles per year in California and Section 177 states. ACT applies to Class 2b-8 truck manufacturers. ACF now applies primarily to California state and local government fleets following the October 2025 amendments. ATCM applies to all manufacturers, importers, and distributors of composite wood products sold in California. Certivo maps your product portfolio against each CARB program's scope automatically.
What are the penalties for CARB non-compliance?
Penalties vary by program. ACC II violations trigger civil penalties for manufacturers failing to meet ZEV sales targets—calculated per vehicle shortfall. ATCM violations can result in fines, product seizure, and stop-sale orders. Omnibus Low NOx non-compliance prevents engine certification, blocking market access entirely. Section 177 states may impose additional state-level penalties. Certivo's regulatory intelligence and horizon scanning flags compliance gaps before enforcement action.
How does Certivo track CARB compliance across multiple programs?
Certivo collects one set of supplier evidence—certifications, test reports, executive orders, and labels—and validates against ACC II, ACT, Omnibus Low NOx, ATCM, and LCFS requirements simultaneously. CORA extracts emission values, model year applicability, and certification attributes from any document format, then maps them to each program's specific thresholds. One submission satisfies multiple CARB program obligations.
Does Certivo support Section 177 state compliance?
Yes. Certivo tracks adoption timelines, enforcement status, and program-specific variations across all 17+ Section 177 states. When a state adopts or amends CARB standards, Certivo updates compliance mappings and alerts you to affected products. State-specific compliance packages are generated from the same underlying supplier evidence—no duplicate campaigns required.
How does CARB compliance relate to federal EPA emissions standards?
CARB standards are typically stricter than federal EPA requirements. Manufacturers selling in California and Section 177 states must meet CARB standards; those selling only in non-adopting states may comply with federal standards alone. CARB requires an EPA waiver to enforce its unique standards. Certivo validates supplier evidence against both CARB and EPA thresholds simultaneously, ensuring multi-jurisdiction compliance from a single supplier self-service portal submission.