Based on the search results, TR CU 031/2012 (TR TS 031/2012) mandates EAC Certification (CoC) for agricultural and forestry vehicles and trailers, excluding the EAC Declaration (DoC) option. Below is a structured analysis: ⚙️ 1. Core Requirements for TR CU 031/2012 Aspect Requirement Applicable Products - Wheeled agricultural/forestry tractors (design speed ≥6 km/h) and trailers - Components: hitches, safety belts, engines, tires, lighting devices, cabins, etc. Exemptions Custom-made/artistic tractors; used vehicles already in service pre-2015 Conformity Assessment EAC Certificate (CoC) only – DoC is not permitted