# GADSL Compliance

## Customer & Industry Requirements

###### Global Automotive Declarable Substance List

## The GADSL Reference List Now Covers Over 3,000 Substances. Can You Declare Every One Across Your Supply Chain?

GADSL compliance requires substance-level material declarations across every tier of your automotive supply chain—with OEMs rejecting IMDS submissions that fail validation. The list updates annually, with intermediate updates triggered by REACH, ELV, and TSCA changes. PFAS reporting thresholds added in 2022 expanded the declaration burden significantly.

3,000+

Substances on the GADSL Reference List (March 2026)

0.1%

Default reporting threshold at homogeneous material level

12 months

Maximum implementation window after each annual update

## Regulation Overview

**Jurisdiction**  
Global (adopted by OEMs in EU, North America, Asia-Pacific)

**Regulatory Body**  
Global Automotive Stakeholder Group (GASG)

**Regulation Number**  
Voluntary industry standard; contractually enforced by OEMs

**Effective Date**  
April 29, 2005 (latest update: March 2026)

**Official Source**  
[https://www.gadsl.org/](https://www.gadsl.org/)

**Key Threshold**  
0.1% w/w of homogeneous material (unless otherwise specified)

# What Is GADSL?

GADSL is the globally harmonized substance list for the automotive industry and the cornerstone of automotive material declaration systems. For supply chain teams, the primary obligation is managing Declarable (D), Prohibited (P), and dual-classified (D/P) substances—chemicals that are regulated, projected to be regulated, or scientifically demonstrated to pose significant risks to human health or the environment.

The GADSL Reference List covers over 3,000 individual substances and substance groups as of March 2026. GASG publishes annual updates each March, with intermediate updates possible when triggered by regulations such as REACH, the ELV Directive, or EPA TSCA. OEMs contractually require GADSL-compliant material data from all automotive suppliers regardless of tier level. Non-compliance results in IMDS submission rejection, contractual liability, and potential supplier de-listing.

GADSL compliance requires full material composition data—CAS numbers, concentrations, and application context—from every supplier. When substances are reclassified or added, your entire material declaration portfolio requires reassessment and resubmission through IMDS.

## Key Components / Sub-Frameworks

### Obligation

- **Must be declared in IMDS if present above 0.1% w/w in homogeneous material**  
  **Declarable Substances (D)**  
  Substances requiring reporting above threshold limits

- **Must not be present; triggers immediate supply chain corrective action**  
  **Prohibited Substances (P)**  
  Substances banned in all automotive applications in at least one region

- **Context-dependent: requires application-level assessment per GADSL guidance**  
  **Dual-Classified (D/P)**  
  Substances prohibited in some applications, declarable in all others

- **All declared substances validated against GADSL within IMDS automatically**  
  **IMDS Integration**  
  International Material Data System—primary reporting platform

- **Determines regulatory urgency and whether future restrictions are likely**  
  **Reason Codes (LR/FA/FI)**  
  Codes explaining why a substance appears on GADSL

- **Mandatory IMDS reporting since 2022 for CRM-containing parts**  
  **Critical Raw Materials**  
  European Critical Raw Materials reported via IMDS-GADSL-CRM

## Key Compliance Requirements

# Who Must Comply

- Tier 1, Tier 2, and Tier 3+ suppliers providing parts or materials to automotive OEMs

- Raw material and chemical suppliers to the automotive value chain

- Automotive OEMs requiring substance transparency for regulatory reporting

- Non-automotive suppliers entering the automotive supply chain (e.g., electronics, chemical manufacturers)

- Companies assembling complex components from multiple sub-tier materials

- Any supplier contractually bound to OEM material declaration standards

# Key Thresholds

#### 0.1% w/w

Default reporting threshold at homogeneous material level (not component or assembly level)

#### 12 months

Maximum implementation window after annual GADSL publication

#### Application-specific

Some substances carry different thresholds based on end-use context

#### PFAS-specific

Low reporting thresholds for PFAS substance groups added in 2022 update

## Core Obligations

1. **IMDS Material Data Sheet**  
   Submit complete material composition with GADSL substance flags for every part  
   **DEADLINE**  
   Prior to part approval and at every material change

2. **Prohibited Substance Elimination**  
   Ensure no P-classified substances are present in declared applications  
   **DEADLINE**  
   Ongoing; validated at IMDS submission

3. **Declarable Substance Reporting**  
   Report all D-classified substances exceeding threshold in homogeneous materials  
   **DEADLINE**  
   Ongoing; updated within 12 months of each GADSL revision

4. **Reclassification Response**  
   Update all affected IMDS entries when substances change classification  
   **DEADLINE**  
   Within 12 months of GADSL update publication

5. **Critical Raw Materials Reporting**  
   Declare CRM-containing parts in IMDS per IMDS-GADSL-CRM requirements  
   **DEADLINE**  
   Mandatory since 2022

## GADSL-Specific Pain Points

###### The Annual Reclassification Cascade

GASG publishes GADSL updates each March—and intermediate updates can arrive without warning when REACH or ELV changes force reclassifications. The 2025 update alone reclassified nearly 2,000 substances. Your team must identify every affected part, trace back to supplier material data, and resubmit through IMDS—while managing ongoing production schedules and customer deliverables.

###### The IMDS Rejection Loop

An OEM rejects your IMDS submission because a substance flagged as D/P was declared without application context. You trace the data back to a Tier 2 supplier who submitted a generic declaration. The supplier responds with a PDF in a non-standard format. Your compliance team manually re-enters the data. The OEM rejects again—a CAS number was transposed. Part approval is delayed by weeks.

###### The Homogeneous Material Trap

GADSL applies the 0.1% threshold at the homogeneous material level—not at the component or assembly level. A coating on a fastener representing 0.001% of total part weight could contain 5% of a declarable substance and trigger full reporting obligations. Without BOM-level compliance intelligence mapping substance concentrations to individual materials, accurate declarations are impossible.

###### The Multi-OEM Declaration Burden

Each OEM enforces GADSL through its own purchasing standards, IMDS configurations, and company-specific restricted substance lists. Volvo Group maintains Appendix B substances beyond GADSL. Other OEMs layer proprietary requirements on top. Suppliers serving multiple OEMs must manage parallel declaration workflows against overlapping but non-identical substance requirements—manual hazardous substance tracking at this scale cannot keep pace.

## Certivo in Action

### Certivo in Action—GADSL Workflow

**GET EVIDENCE IN**  
Collect Material Declarations from Every Supplier—Without the Chasing  
CORA launches targeted campaigns to collect substance-level material declarations, follows up automatically, and accepts responses in any format—eliminating the need for suppliers to submit in standardized IMDS-compatible templates.

- Launch declaration campaigns to hundreds of suppliers with one click
- CORA-powered outreach in suppliers' native languages
- Accept any format: PDFs, Excel, IMDS exports, IPC-1752, freeform responses
- Track response rates and escalate non-responders automatically

**MAKE SENSE OF IT**  
Know Instantly When Materials Exceed GADSL Thresholds  
CORA extracts every substance to CAS number level, validates against the current GADSL Reference List, and flags threshold exceedances and prohibited substance violations automatically.

- CORA parses declarations to extract CAS numbers, concentrations, and application context
- Automatic validation against all 3,000+ GADSL substances including D, P, and D/P classifications
- Real-time alerts when GADSL updates reclassify substances affecting your portfolio
- Threshold calculations at homogeneous material level per GASG guidance

⚠️

**PROVE COMPLIANCE OUT**  
Generate IMDS-Ready Data and OEM Packages in Hours, Not Weeks  
Produce validated material declarations and OEM-specific compliance packages instantly from verified supplier data.

- Pre-validated substance data formatted for IMDS submission workflows
- OEM-specific compliance packages with full material traceability
- Customer-specific templates covering GADSL plus proprietary restricted substance lists
- Complete audit trail for every extraction, validation, and submission

## One Supplier Submission. Validation Against 3,000+ GADSL Substances. IMDS-Ready in Hours.

Certivo reads supplier documents, extracts substance data to CAS number precision, validates against the complete GADSL Reference List, and generates OEM-ready compliance evidence automatically. When GASG publishes updates, Certivo reassesses your portfolio and alerts you—before OEMs reject your submissions.

**CAS-Level Extraction**  
**GADSL Full-List Validation**  
**IMDS-Ready Exports**  
**OEM Package Generator**  
**Annual Update Alerts**

## Features Tabs

- **Declaration Collection**  
Certivo's automated campaigns achieve 95% response rates vs. 20–30% with manual outreach.

- **Substance Extraction**  
Every declaration parsed to CAS number level automatically—no manual data entry into IMDS.

- **GADSL Monitoring**  
Always validated against the current GADSL—not your last annual review.

- **OEM Compliance Packages**  
Generate validated compliance documentation in hours instead of 4–6 weeks of manual compilation.

- **IMDS Submission Support**  
Pre-validated substance data turns IMDS from bottleneck to streamlined workflow.

## Related Regulations

**EU REACH**  
GADSL incorporates REACH SVHCs; REACH updates trigger intermediate GADSL revisions

**Combined Value**  
Single declaration collection validates against GADSL and REACH simultaneously

**EU RoHS**  
RoHS restricted substances overlap with GADSL prohibited entries for electronics in vehicles

**Combined Value**  
Unified substance extraction covers both automotive and electronics compliance

**EU ELV Directive**  
IMDS and GADSL were created to operationalize ELV recyclability requirements

**Combined Value**  
GADSL declarations feed directly into ELV compliance documentation

**TSCA (US)**  
US EPA TSCA changes—including PFAS reporting—drive GADSL intermediate updates

**Combined Value**  
Multi-framework validation from one supplier submission

**PFAS Regulations**  
GADSL added thousands of PFAS substances with low thresholds in 2022

**Combined Value**  
Tracks PFAS across GADSL, REACH, and emerging regional frameworks

**California Prop 65**  
Some GADSL-listed substances overlap with Prop 65 warning requirements

**Combined Value**  
Unified database flags Prop 65 chemicals alongside GADSL substances

## Managing GADSL alongside related regulations and frameworks eliminates duplicate supplier requests. Certivo validates one submission against multiple frameworks simultaneously.

## Industries Most Impacted

**Automotive Manufacturing**  
Your Pain Point  
Full IMDS compliance across thousands of parts; OEM-specific substance lists layered on GADSL

**Electronics Manufacturing**  
Your Pain Point  
EV and ADAS components entering automotive supply chains face unfamiliar GADSL/IMDS requirements

**Industrial Machinery & Heavy Equipment**  
Your Pain Point  
Commercial vehicle OEMs (Volvo, Daimler) enforce GADSL with proprietary restricted substance appendices

**Chemical Manufacturing**  
Your Pain Point  
Raw material suppliers must provide full substance composition data for downstream IMDS entries

**Building Materials & Construction**  
Your Pain Point  
Construction vehicle components and off-highway equipment fall under GADSL scope

**Aerospace & Defense**  
Your Pain Point  
Dual-use components serving both aerospace and automotive programs face overlapping substance regimes

## Return on Investment

##### 80%
###### Reduction in Declaration Labor
From Manual Data Entry to Exception Management

CORA extracts substance data and validates against the full GADSL Reference List automatically. Your team focuses on reclassification exceptions and prohibited substance investigations—not manual IMDS data entry.

##### 4 Hours
###### To OEM-Ready Packages
IMDS Declaration Acceleration  
Generate complete, validated material declaration packages in hours—not the 4–6 weeks of manual compilation, supplier chasing, and iterative IMDS resubmissions.

##### Real-Time
###### GADSL Sync
Proactive Substance Monitoring

When GASG publishes annual or intermediate updates, Certivo reassesses your portfolio instantly. Know which parts are affected before OEMs flag rejected submissions.

## Key Statistics

- 3,000+
Substances tracked with automatic GADSL Reference List sync

- 99.2%
Substance extraction accuracy from supplier declarations

- 95%
Supplier response rate with CORA-powered campaigns

## Frequently Asked Questions

**What companies are subject to GADSL compliance obligations?**  
Any company supplying parts, materials, or chemicals to automotive OEMs is subject to GADSL obligations through contractual purchasing requirements. This includes Tier 1 through sub-tier suppliers, raw material producers, and chemical companies. While GADSL is a voluntary industry standard maintained by GASG, OEMs make it contractually enforceable—non-compliant IMDS submissions are rejected, and persistent failures risk supplier de-listing. Certivo automates the full declaration workflow from supplier data collection through IMDS-ready validation.

**What happens if a supplier fails to meet GADSL requirements?**  
Non-compliance carries direct operational consequences rather than government-imposed fines. OEMs reject non-compliant IMDS submissions, blocking part approval and halting production timelines. Repeated failures trigger contractual penalties, supply chain escalation, and potential removal from approved supplier lists. CORA's automated validation catches GADSL compliance gaps before submissions reach OEM review, eliminating the rejection cycle entirely.

**How often is GADSL updated and how does Certivo track changes?**  
GASG publishes the primary GADSL update each March, with a 12-month supplier implementation window. Intermediate updates can occur when triggered by REACH Candidate List additions, ELV Directive changes, or EPA TSCA developments. Certivo maintains continuous sync with the GADSL Reference List, incorporating substance additions and reclassifications within days of publication. CORA reassesses your entire material portfolio against each update and alerts you to affected parts automatically.

**What is the relationship between GADSL and IMDS?**  
IMDS is the automotive industry's centralized data platform for material and substance reporting, and GADSL is the substance list against which IMDS validates all declarations. Every material submitted in IMDS is automatically checked against GADSL classifications—Declarable, Prohibited, and D/P entries are flagged for supplier action. Certivo bridges the gap between raw supplier data and IMDS-ready declarations, extracting substance data from any format and pre-validating against the full GADSL Reference List before submission.

**Does Certivo validate against GADSL alongside other automotive and chemical regulations?**  
Yes. Certivo validates the same supplier submission against GADSL, REACH, RoHS, ELV, TSCA, Prop 65, PFAS regulations, and OEM-specific restricted substance lists simultaneously. This eliminates duplicate collection campaigns and ensures that a single material declaration satisfies multiple compliance frameworks. CORA flags substances that carry different classifications across frameworks—such as a substance that is Declarable under GADSL but an SVHC under REACH—enabling proactive risk assessment before OEM or regulatory deadlines arrive.

## Ready to Automate GADSL Compliance?

See how Certivo's automotive compliance software transforms substance declarations from reactive firefighting to proactive confidence across your entire supply chain.