IEC 62631-3-1:2023 is available as IEC 62631-3-1:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62631-3-1:2023 specifies a method of test for the determination of volume resistance and volume resistivity of electrical insulating materials by applying a DC voltage. This edition includes the following significant technical changes with respect to the previous edition:
- following the withdrawal of IEC 60093 and its partial replacement with the first edition of IEC 62631-3-1, the missing editorial and technical texts have been added and incorporated into this second edition of IEC 62631-3-1;
- the alignment of normative texts and informative notes have been addressed as well as the normative references and bibliography.