Division 3.3

A type-approval number in accordance with F1Annex IV to Commission Implementing Regulation (EU) 2020/683 shall be assigned to each type of replacement silencing system, or components thereof, approved as a separate technical unit; section 3 of the type-approval number shall indicate the number of this Regulation. Furthermore, if the replacement silencing system is intended to be fitted on vehicle types complying with the limit values of Phase 1 in Annex III only, section 3 of the type-approval number shall be followed by the character ‘A’. If the replacement silencing system is intended to be fitted on vehicle types complying with the limit values of Phase 2 in Annex III only, section 3 of the type- approval number shall be followed by the character ‘B’. If the replacement silencing system is intended to be fitted on vehicle types complying with the limit values of Phase 3 in Annex III, section 3 of the type- approval number shall be followed by the character ‘C’. The F2approval authority shall not assign the same number to another type of replacement silencing system, or components thereof.