GOST R VS EAC (CU-TR) Full Comparison & Selection Rule Core Supreme Principle (2026 Valid Rule) EAC coverage takes absolute priority; GOST R only applies to goods not covered by any TR CU technical regulation. If your product falls under any EAEU TR CU regulation → Mandatory EAC (CoC / DoC). GOST R alone cannot clear Russian customs; customs will detain goods. If no matching TR CU covers your goods → Check Russia Decree No.2425 mandatory list: Inside list: Mandatory GOST R (CoC / DoC) with CTP mark; Outside list: Voluntary GOST R or EAEU Exemption Letter for customs clearance. 1. Fundamental Definition & Legal Power EAC (CU-TR Certificate / Declaration) Full name: Eurasian Conformity Certificate, based on TR CU unified technical regulations of EAEU Jurisdiction: 5 EAEU countries: Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan. One certificate valid for all five markets. Legal rank: EAEU supranational law, higher than Russia’s domestic GOST R standards. Mark: Diamond-shaped EAC logo printed on product & package. GOST R Certificate / DoC Declaration Full name: Russian National State Standard Conformity Document, based on Russian Federal Law + GOST R national standards, Decree No.2425 Jurisdiction: Only Russia mainland; invalid for other EAEU nations. Legal rank: Domestic national rule, only supplementary when no EAC regulation exists. Mark: Circular CTP (formerly PCT) logo with QR code.