23. The expert from Germany introduced ECE/TRANS/WP.29/GRE/2013/18 aiming to avoid intentional (voltage) variation of passing beam, using halogen light sources. Agreeing that the proposed wording would be in contradiction with adaptive front light systems, the expert agreed to update his proposal. GRE agreed to resume consideration on this matter on the basis of an updated formal proposal, which the expert from Germany volunteered to prepare for the October 2013 session of GRE.