Document ID: chunk:federal_register_of_legislation:F2021C01210:reg:6:p8
Version: federal_register_of_legislation:F2021C01210
Segment Type: reg
Provision Reference: reg 6 (pt 8/24)
Character Range: 21750–24636

Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, and the numbers thus assigned shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement.

        5.5 If the engine conforms to a type approved, under one or more other Regulations annexed to the Agreement, in the country which has granted approval under this Regulation, the symbol prescribed in paragraph 5.4.1 need not be repeated: in such a case, the Regulation and approval numbers of all the Regulations under which approval has been granted in the country which has granted approval under this Regulation shall be placed in vertical columns to the right of the symbol prescribed in paragraph 5.4.1.
5.6 The approval mark shall be clearly legible and be indelible.
        5.7 The approval mark shall be placed close to the engine identification figures provided by the manufacturer.
        5.8 Annex 3 to this Regulation gives examples of the arrangements of the approval mark.

6. SPECIFICATIONS AND TESTS
6.1 General
        The components liable to affect the emission of visible pollutants shall be so designed, constructed and assembled as to enable the engine in normal use, despite the vibration to which it may be subjected, to comply with the provisions of this Regulation.
6.2 Specifications concerning cold-start devices
        6.2.1 The cold-start device shall be so designed and constructed that it cannot be brought into or kept in action when the engine is running normally.
        6.2.2 The provisions of paragraph 6.2.1 above shall not apply if at least one of the following conditions is met:
        6.2.2.1 The light absorption coefficient of the gases emitted by the engine at steady speeds when measured by the procedure prescribed in annex 4 to this Regulation with the cold-start device operating, is within the limits prescribed in annex 7 to this Regulation.
        6.2.2.2 Keeping the cold-start device in operation causes the engine to stop within a reasonable time.
        6.2.3 If necessary any vehicle related part of the system may be simulated for the approval test.
6.3 Specifications concerning the emission of visible pollutants
        6.3.1 The emission of visible pollutants by the engine submitted for approval shall be measured by the methods described in annexes 4 and 5 to this Regulation.
        6.3.2 The power of the engine submitted for approval shall be within the tolerances specified under paragraph 3.1.5 of annex 4 to this Regulation.
        6.3.3 The emission of visible pollutants, as measured by the method described in annex 4 to this Regulation, shall not exceed the limits prescribed in annex 7 to this Regulation.
        6.3.4 At the request of the manufacturer additional tests described in annexes 4 and 5 shall be performed to obtain