Document ID: chunk:federal_register_of_legislation:F2018L01517:reg:30:p9
Version: federal_register_of_legislation:F2018L01517
Segment Type: reg
Provision Reference: reg 30 (pt 9/12)
Character Range: 37255–40074

tread depth ≥ 16 mm and void to fill ratio ≥ 35 per cent
6.3.2. In order to be classified as a 'professional off-road tyre', a tyre shall have all of the following characteristics:
                  (a) For C2 tyres:
                   (i) A tread depth ≥ 11 mm;
                   (ii) A void to fill ratio ≥ 35 per cent;
                   (iii) A maximum speed rating of ≤ Q.
                  (b) For C3 tyres:
                   (i) A tread depth ≥ 16 mm;
                   (ii) A void to fill ratio ≥ 35 per cent;
                   (iii) A maximum speed rating of ≤ K.
7. Modification and extension of approval of a tyre type
7.1. Every modification of a tyre type shall be notified to the Type Approval Authority, which approved the tyre type.  That Authority may then either:
7.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case the tyre still meets the requirements; or
7.1.2. Require a further test report from the Technical Service responsible for carrying out the tests.
7.2. A modification of the tread pattern of the tyre shall not be considered to necessitate a repetition of the tests prescribed in paragraph 6. of this Regulation.
7.3. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the procedure specified in paragraph 5.3. above to the Parties to the Agreement which apply this Regulation.
7.4. The competent Type Approval Authority issuing the extension of approval shall assign a series number for such an extension and inform thereof the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation.
8. Conformity of production
 The conformity of production procedures shall comply with those set out in the 1958 Agreement, Schedule 1 (E/ECE/TRANS/505/Rev.3) with the following requirements:
8.1. Tyres approved under this Regulation shall be so manufactured as to conform to the type approved, by meeting the requirements set forth in paragraph 6. above.
8.2. The Type Approval Authority, which has granted type approval, may at any time verify the conformity control methods applied in each production facility.  For each production facility, the normal frequency of these verifications shall be once every two years.
9. Penalties for non-conformity of production
9.1. The approval granted in respect of a type of tyre pursuant to this Regulation may be withdrawn if the requirement laid down in paragraph 8.1. above is not complied with or if the tyres taken from the series have failed to pass the tests prescribed in that paragraph.
9.2. If a Party to the Agreement, which applies this Regulation, withdraws an approval it has previously granted, it shall forthwith so notify the other Contracting