Proposal to correct a reference to standard IEC (pursuant to a change in paragraph numbering of the IEC standard) and to align UN R37 with UN R48 and UN R128 with regard to the use of the term “chromaticity area”. The wording “required tolerance area” in case of colour is changed to “required chromaticity area” to align with Regulation No. 48. This proposal was initiated by a proposal to amend Regulation No. 128 aimed at avoiding confusion with other tolerance areas.