6.2.1.

When parts of the headlamp cleaner in the rest position(s) are on the headlamps' illuminating surface, the photometric values of the headlamps, and of the lamps which are grouped or reciprocally incorporated with the headlamp as submitted for test, measured at the points listed in the appropriate Regulation for which minimum values are specified, shall not be reduced by more than 5 per cent in any normal rest position(s) of those parts, with respect to those measured before installation of the cleaning device; in no case shall these values be less than the values prescribed in the Regulation in question;

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