Proposal to amend para. 2.4.10. to define a pair for vehicles of categories M, N and O as one or more lamp(s) extending from left to right-hand side, amend para. 2.4.11. and 2.4.12. to define single and multiple lamps and interdependent lamp systems marked Y, amend para. 5.5. and its sub-paragraphs to establish requirements for paired lamps including symmetry and photometric characteristics, amend para. 5.7.2.2. and 5.7.2.3. to specify installation requirements for single lamps, delete para. 5.7.2.4. concerning positioning and length requirements, amend para. 5.18.2. regarding assembly of lamps marked D, add para. 4.7.3. to UN Regulation No. 148 requiring a pair to contain at least one light source on each side, and amend para. 4.8.1.3. to clarify photometric measurement procedures when lamps use multiple light sources.