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Solutions by requirement
One process, any standard
Four kinds of demand arrive at the same team from four directions. An auditor wants conformance. A customer wants a filled template. A rating wants a score. An investor wants a disclosure. The Twin holds the evidence once and answers all four.
Certification and assurance standards
A third party audits a site and confirms you conform. You can hold it, and you can lose it.CMSI, consolidating Copper Mark, ICMM Mining Principles, TSM and the Responsible Gold Mining Principles, not yet published · IRMA, independent and multi-stakeholder governed, scored at 50, 75 and 100 · Copper Mark · TSM · ICMM · RGMP · ResponsibleSteel · ASI · RJC · GISTM · ISO 14001 and 45001
Due diligence programmes
They set out how to check your chain, and an auditor checks that you did.OECD Due Diligence Guidance, the five-step process everything else is built on · RMI RMAP, the audit programme for smelters and refiners · LBMA, mandatory for Good Delivery refiners · LME, a listing condition for brands
Reporting templates
They are files. You fill them in and send them to a customer.CMRT, tin, tantalum, tungsten and gold · EMRT, cobalt, mica, copper, graphite, lithium and nickel · AMRT, everything else · LMEpassport
Ratings and scores
Someone scores you. There is no certificate to hold.EcoVadis · CDP · S&P Global CSA
Disclosure frameworks and memberships
They shape what you publish, or they are a body you join.GBA and the Battery Passport · UNGC · GRI, including the mining sector standard · ISSB, TCFD, TNFD
Law
A government wrote it, and you have no choice.CBAM · EU Battery Regulation · the conflict minerals rules behind CMRT · LkSG · California SB 253 and SB 261 · UK Modern Slavery Act
The standards overlap more than they admit
One water management plan can serve three schemes at once. Copper Mark recognises an IRMA audit at 50 and above. The Risk Readiness Assessment is a shared entry point. That is why the answer is one structured evidence base rather than one project per standard.