| The colour of the light emitted inside the field of the light distribution grid defined at paragraph 2. of Annex 4 shall be amber. However it can be red, if the rearmost side-marker lamp is grouped or combined or reciprocally incorporated with the rear position lamp, the rear end-outline marker lamp, the rear fog lamp, the stop lamp, or is grouped with or has part of the light emitting surface in common with the rear retro-reflector. To check these colorimetric characteristics, the test procedure described in paragraph 9. of this Regulation shall be applied. Outside this field no sharp variation of colour shall be observed. | a0c0 |