What is the CMRT?

What is the CMRT (Conflict Minerals Reporting Template)?

The Conflict Minerals Reporting Template (CMRT) is a standardized supply chain reporting template developed by the Responsible Minerals Initiative (RMI). It enables companies to collect and share due diligence information about tin, tungsten, tantalum, and gold—commonly known as 3TG minerals—in their supply chains.

The CMRT was created to support compliance with global conflict minerals regulations, including Section 1502 of the U.S. Dodd-Frank Act and the EU Conflict Minerals Regulation (EU 2017/821). It helps companies demonstrate responsible sourcing, supply chain transparency, and OECD-aligned due diligence for minerals that may originate from Conflict-Affected and High-Risk Areas (CAHRAs).

The CMRT captures essential data:

  • Smelters and refiners processing 3TG minerals
  • Country or region of origin
  • Whether sourcing involves Conflict-Affected or High-Risk Areas (CAHRAs)
  • Supplier sourcing and due diligence policies and practices

Instead of responding to multiple custom surveys, suppliers complete one standardized template and provide it to their customers. This improves consistency, transparency, and efficiency across the supply chain while supporting regulatory compliance and responsible sourcing objectives.

You can download the latest version of the CMRT directly from the RMI website.

What Minerals Are Included in the CMRT?

The CMRT covers four minerals commonly referred to as 3TG: 

Mineral
Why It Matters
Key Risk Areas
Regulatory Drivers
Tin
Essential for solder in electronics, packaging, and industrial alloys
Informal and artisanal mining, lack of traceability, conflict financing in parts of Central Africa
Dodd-Frank Act (Section 1502),
EU Conflict Minerals Regulation
Tungsten
Used in industrial tools, electronics, automotive components, and aerospace
Smuggling, conflict-affected regions, opaque supply chains
Dodd-Frank Act (Section 1502),
EU Conflict Minerals Regulation
Tantalum
Critical for capacitors in smartphones, medical devices, and electronics
Artisanal mining, conflict financing, human rights risks
Dodd-Frank Act (Section 1502),
EU Conflict Minerals Regulation
Gold
Used in electronics, jewelry, aerospace, and financial reserves
Illegal mining, money laundering, conflict financing, environmental damage
Dodd-Frank Act (Section 1502),
EU Conflict Minerals Regulation

These minerals have historically been linked to armed conflict, forced labor, and human rights abuses, particularly in parts of Central Africa.

CMRT vs. EMRT – What’s the Difference?

The CMRT and EMRT are complementary reporting templates used for responsible minerals due diligence.

The Conflict Minerals Reporting Template (CMRT) focuses on 3TG (tin, tungsten, tantalum, and gold) minerals under:

  • Dodd-Frank Act (Section 1502, United States)
  • EU Conflict Minerals Regulation

The Extended Minerals Reporting Template (EMRT), by contrast, addresses additional minerals that are not traditionally covered by conflict minerals law but are increasingly regulated or required under ESG and battery legislation.

Today, many manufacturers must manage both templates simultaneously, creating new complexity in supplier communication and data consolidation.

Learn more about Extended Minerals & EMRT Compliance

CMRT   
  • Covers 3TG (tin, tungsten, tantalum, gold) 
  • Focused on conflict financing  
  • Driven by Dodd-Frank & EU 2017/821    
  • Long-standing regulatory requirement  
     
EMRT
  • Covers cobalt, mica, lithium, nickel, natural graphite, copper
  • Focused on human rights + environmental risks
  • Driven by ESG expectations & EU Battery Regulation
  • Emerging due diligence and battery compliance driver

Why is the CMRT required?

Two major regulatory frameworks drive the use of the CMRT: Section 1502 of the U.S. Dodd-Frank Wall Street Reform and Consumer Protection Act and the EU Conflict Minerals Regulation (EU) 2017/821. Both require companies to conduct supply chain due diligence on tin, tungsten, tantalum, and gold (3TG) and to disclose their sourcing practices.

U.S. Dodd-Frank Act (Section 1502)

Section 1502 of the U.S. Dodd-Frank Act requires publicly listed U.S. companies to determine whether products contain 3TG minerals and conduct supply chain due diligence where necessary. Companies must file annual disclosures with the SEC and document their sourcing practices.
 

EU Conflict Minerals Regulation (EU) 2017/821

The EU Conflict Minerals Regulation requires EU importers of 3TG minerals and metals to implement due diligence processes, identify risks, establish mitigation measures, and maintain transparency regarding sourcing practices.

Learn more about Conflict Minerals Compliance and 3TG Due Diligence

How Companies Manage CMRT at Scale

Managing CMRT effectively requires more than sending spreadsheets to suppliers.

Companies typically implement structured workflows to:

  • Identify in-scope suppliers
  • Distribute CMRT templates simultaneously
  • Track response rates with automated reminders
  • Consolidate supplier responses
  • Validate smelters against RMI databases
  • Generate audit-ready documentation

Modern compliance platforms like eliminate manual consolidation and enable centralized oversight of both CMRT and EMRT reporting within one system.

How CDX Simplifies CMRT Reporting

Collect, validate, and consolidate supplier CMRTs in one centralized system. CDX helps you manage responsible minerals reporting efficiently and with confidence.