UN R121: Proposal for Supplement 3 to the 01 series of amendments
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Proposal to apply footnote 18 to the symbol for tell-tale No. 1 (master lighting switch) in order to simplify the treatment of colour changes of tell-tales. Footnote 18 specifies "“Symbol may be shown in other colours than specified in column 5 in order to convey different meanings according to the general colour coding as proposed in paragraph 5. of ISO 2575-2004.” This proposal clarifies the existing understanding of the intent of the regulation and in particular addresses concerns over interpretation where tell-tales Nos. 1 and 19 have been combined.

Reference Number: WP.29/2018/26
Date: 28 December 2017
Proposal Status: Adopted
Related Documents:
GRSG-113-42 | UN R121: Proposal for Supplement 10 to the original series of amendments and Supplement 2 to the 01 series of amendments
GRSG/2017/18 | Proposal for Supplement 10 to the original series of amendments and Supplement 2 to the 01 series of amendments to Regulation No. 121
GRSG/2018/6 | UN R121: Proposal for Supplement 10 to the original series of amendments and Supplement 2 to the 01 series of amendments