OEM Requirements
Substances on the GADSL Reference List (March 2026)
Default declaration threshold for homogeneous materials
Mandatory GADSL update cycle with IMDS synchronization
Regulation Overview
GADSL is the globally harmonized substance declaration standard for the automotive industry and the backbone of automotive material compliance. For supply chain teams, the primary obligation is declaring substances classified as Prohibited (P), Declarable (D), or Declarable/Prohibited (D/P)—chemicals that are regulated, projected to be regulated, or scientifically demonstrated to pose risks to human health or the environment.
The GADSL Reference List covers over 3,000 substances as of March 2026. GASG updates the list annually—typically published in March—with substance reclassifications, new additions, and alignment to evolving regulations including REACH, RoHS, TSCA, and ELV requirements. Companies supplying parts to automotive OEMs must declare these substances through IMDS when concentrations exceed the 0.1% threshold at the homogeneous material level.
GADSL compliance requires substance-level data—CAS numbers and weight percentages—from every supplier in the automotive value chain. When the list updates, your entire material portfolio requires reassessment against the latest classifications.
Automotive OEMs incorporating GADSL into supplier standards
Tier 1 suppliers delivering parts and assemblies to OEMs
Tier 2 and Tier 3 suppliers providing materials and sub-components
Chemical and material suppliers to the automotive value chain
Non-automotive suppliers entering the automotive supply chain
Companies reporting material data through IMDS or CAMDS
Key Thresholds
GASG updates the GADSL annually in March. New substances and reclassifications mean thousands of parts to reassess—but supplier declarations are 12 months old and buried in emails. Your team spends weeks identifying affected suppliers, then months chasing responses to update IMDS entries.
An OEM rejects your IMDS submission because a GADSL substance is hidden in a wildcard. You need substance data from 15 suppliers across 3 tiers. Supplier 1 responds in Japanese. Supplier 2 sends a format your team cannot parse. Supplier 3 doesn't respond. Production holds while compliance scrambles.
GADSL applies the 0.1% threshold at the homogeneous material level—not the part or assembly level. A minor additive in a coating compound could exceed the threshold while being undetectable at the part level. Without substance-level BOM mapping, you cannot identify actual exposure across your material portfolio.
Different OEMs layer additional requirements on top of GADSL. Volvo adds Appendix B restrictions. Renault maintains BGO-specific lists. BMW expects PCF data alongside material declarations. Manual substance tracking across multiple OEM portals, each with different formats and deadlines, is unsustainable at scale.
Certivo In Action
Certivo in Action — GADSL Workflow
Features Tabs
Automotive Manufacturing
Your Pain Point
OEM flowdown requirements; IMDS submission complexity; multi-OEM variant handling
Electronics Manufacturing
Your Pain Point
Complex BOMs; substances in PCBs, connectors, solder, and coatings
Industrial Machinery & Heavy Equipment
Your Pain Point
Volvo Group, Caterpillar, and other OEM-specific substance restrictions beyond GADSL
Chemical Manufacturing
Your Pain Point
Upstream substance data responsibility; SDS management; downstream declaration accuracy
Building Materials & Construction
Your Pain Point
Heavy equipment OEM requirements; ELV overlap; diverse material inputs across vehicle applications
Aerospace & Defense
Your Pain Point
Cross-industry parts supplying both automotive and aerospace OEMs; dual framework obligations
From Data Entry to Exception Management
CORA extracts substance data automatically. Your team focuses on exceptions that need human judgment—not manual substance tracking across IMDS and OEM portals.
GADSL Declaration Acceleration
Generate complete, audit-ready GADSL substance packages in hours—not the 4–6 weeks of manual compilation across supplier tiers.
Proactive GADSL Compliance Monitoring
When GASG updates the list, Certivo reassesses your portfolio instantly. Know which parts are affected before OEMs ask.
Frequently Asked Questions
What products and companies are subject to GADSL declaration obligations?
Any company supplying parts or materials to automotive OEMs that has GADSL incorporated into its contractual requirements must comply. This includes Tier 1, Tier 2, and Tier 3 suppliers, chemical and material suppliers, and non-automotive companies entering the automotive value chain. The obligation applies at the homogeneous material level—not the finished part level. CORA automates the substance extraction and validation process, ensuring every declaration meets GADSL thresholds regardless of supplier tier.
What are the consequences of GADSL non-compliance?
GADSL non-compliance results in IMDS submission rejections from OEMs, production holds, lost supplier ratings, and potential removal from approved supplier lists. OEMs increasingly audit substance declarations as part of supplier qualification—incomplete or inaccurate GADSL data can disqualify a supplier from future programs. Certivo's continuous compliance monitoring and audit readiness capability ensures your substance data remains current and OEM-ready between annual list updates.
How does Certivo track updates to the GADSL?
Certivo maintains continuous sync with the GADSL, incorporating substance additions and reclassifications within days of the annual publication. When the March 2026 update added 78 new substances and reclassified 51 entries, CORA reassessed affected portfolios and alerted customers to impacted parts, triggering the appropriate declaration update workflows automatically through regulatory intelligence and horizon scanning.
What declaration formats does Certivo accept from suppliers?
Certivo accepts any format: PDF declarations, Excel spreadsheets, IMDS exports, XML files, and freeform responses. CORA extracts substance data regardless of format or language through AI document parsing and certificate validation, eliminating the need to standardize supplier inputs across your automotive supply chain. This format-agnostic approach supports multi-tier supply chain transparency across global supplier networks.
Does Certivo support GADSL alongside REACH, RoHS, and PFAS frameworks?
Yes. Certivo validates against GADSL, REACH, RoHS, TSCA, PFAS, and ELV requirements simultaneously, flagging substances that trigger obligations across any framework. The same supplier submission is screened against multiple regulatory lists—eliminating duplicate collection campaigns and supporting supplier risk scoring and due diligence across your entire material portfolio through a centralized compliance data backbone.