This revision reproduces the following amendment(s):
UN R121: Proposal for Supplement 4 to the 01 series of amendments

Proposal in line with ISO 2575 to allow for the use of different colors (e.g., red, yellow, green) to convey the status modes (e.g., failure, active) of seven functions via modification of footnote 18 under Table 1.

Authentic and legally binding text WP.29/2020/22