The conformity of the declared fuel efficiency and wet grip classes as well as the declared external rolling noise class and measured value must be assessed for each tyre type or each grouping of tyres as determined by the supplier, according to one of the following procedures:
a single tyre is tested first. If the measured value meets the declared class or external rolling noise measured value, the test is passed;
and
if the measured value does not meet the declared class or external rolling noise measured value, three more tyres are tested. The average measurement value stemming from the four tyres tested are used to assess conformity with the declared information;
or
where the labelled classes or values are derived from type approval test results obtained in accordance with Directive 2001/43/EC, Regulation (EC) No 661/2009, or UNECE Regulation No 117 and its subsequent amendments, Member States may make use of the tyre conformity of production data from these type approvals.
Assessment of conformity of production data must take into account allowances as specified in section 8 of UNECE Regulation No 117 and its subsequent amendments.