22. The expert from Germany presented a joint proposal by Germany, the Netherlands and IEC, introducing into Regulations Nos. 48 and 112 requirements to avoid intentional non-approved voltage variation of the passing and driving beam for halogen light sources (ECE/TRANS/WP.29/GRE/2014/31, GRE-72-14). The experts from France, Italy, Sweden and UK expressed some concerns and were not in a position to agree to this proposal. GRE decided to revert to this issue at its next session on the basis of a revised proposal to be submitted by the expert from Germany.

28. The expert from IEC introduced GRE-71-13 proposing alternatives to ECE/TRANS/WP.29/GRE/2013/62 on electronic light source control gear:

(a) Restricting the voltage range for (halogen) filament light sources, to avoid (semi-)permanent too low or too high luminous intensity of the headlamp and subsequent shorter lifetime of the filament light source and;

(b) Inserting a lower voltage limit and verifying that the headlamp performance, in terms of luminous intensity, under the normal operating conditions of the vehicle’s electrical system is still compliant with the requirements of UN Regulation No. 112.

29. A number of experts delivered remarks on this document. GRE invited other experts to transmit their comments, if any, to IEC and decided to revert to this issue on the basis of a revised document to be prepared by IEC.

20. The expert from Germany, referring to ECE/TRANS/WP.29/GRE/2013/18, introduced a revised proposal (ECE/TRANS/WP.29/GRE/2013/62) on avoiding intentional voltage variation of a passing beam using halogen light sources. The expert from the Netherlands proposed clarifications to this proposal (GRE-70-17). The expert from IEC proposed an alternative to this proposal (GRE-70-34). The expert from France requested to simplify this proposal. The expert from Austria expressed reservations about the test procedure proposed in this proposal. The expert from Germany clarified that his proposal addressed and superseded the proposal ECE/TRANS/WP.29/GRE/2013/44 under agenda item 8 below. GRE agreed to revisit this subject at its next session on the basis of a revised document, which the expert from Germany volunteered to prepare, in coordination with the experts from France and IEC.