Proposal to amend para. 6.7.4.1. to require minimum distance of not less than 400 mm between inner edges of two apparent surfaces for M₁ and N₁ category vehicles and not less than 600 mm for all other categories, amend para. 6.9.4.1. to require no special requirement for M₁ and N₁ category vehicles and not less than 600 mm for all other categories, and amend para. 6.10.4.1. to require not less than 400 mm for M₁ and N₁ category vehicles and not less than 600 mm for all other categories, addressing concerns about continuous LED light bars affecting hazard perception and traffic safety.