Revision 3 has been prepared purely as documentation tool. The authentic and legally binding texts are WP.29/2002/51, WP.29/2003/59, WP.29/2004/2, and WP.29/2001/40. This document incorporates the following changes:

Proposal to introduce provisions for triangular retro-reflectors of Class IIIB.

The amendment to paragraph 2.9.3. of Regulation No. 48 (Supplement 3 to the 02 series of amendments) introduced into the definition of the illuminating surface of a retro-reflector the reference to the declaration of this surface by the applicant during type approval of the device. This proposal amends UN R3 to provide for this procedure.

Proposal to amend the trichromatic coordinates for red light in view of new technologies used in light sources and to promote harmonization by adopting limits specified in SAE J578 and CIE No. 2.2 (TC – 1.6) 1975.

Proposal to allow the fitting of retro-reflecting devices in different positions on different vehicle types.

Revision 3 | Amendment 2 has been prepared purely as documentation tool. The authentic and legally binding text is WP.29/2009/11. This document incorporates the following change:

Proposal to transfer the colorimetric coordinates of UN R3 to UN R48 as part of the larger project to consolidate the colorimetric coordinates of active and passive light devices under UN R48.

Revision 4 has been prepared purely as documentation tool. The authentic and legally binding texts are WP.29/2002/51, WP.29/2003/59, WP.29/2004/2, WP.29/2006/49, WP.29/2009/11, and WP.29/2012/62. This document incorporates the following changes:

Proposal to clarify the scope of UN R3 through specific reference of its applicability to vehicles of categories L, M, N, O, and T.

Proposal to transfer the colorimetric coordinates of UN R3 to UN R48 as part of the larger project to consolidate the colorimetric coordinates of active and passive light devices under UN R48.

Proposal to correct and harmonize provisions concerning approval markings.

Proposal to introduce provisions for triangular retro-reflectors of Class IIIB.

The amendment to paragraph 2.9.3. of Regulation No. 48 (Supplement 3 to the 02 series of amendments) introduced into the definition of the illuminating surface of a retro-reflector the reference to the declaration of this surface by the applicant during type approval of the device. This proposal amends UN R3 to provide for this procedure.

Proposal to amend the trichromatic coordinates for red light in view of new technologies used in light sources and to promote harmonization by adopting limits specified in SAE J578 and CIE No. 2.2 (TC – 1.6) 1975.

Revision 4 | Amendment 2 has been prepared purely as documentation tool. The authentic and legally binding texts are . This document incorporates the following change:

Revision 4 | Amendment 4 has been prepared purely as documentation tool. The authentic and legally binding texts are . This document incorporates the following change: