In December 1986 the International Commission on Illumination (CIE), the International Organization for Standardization (ISO), and the International Electrotechnical Commission (IEC), entered into a Memorandum of Understanding (MoU). This MoU acknowledged the scope of each organization, each was to avoid overlapping work in light and lighting, and avoid duplication of each other’s scope. Further to this in 1989, ISO formally recognized the CIE as an international standards organization in Council Resolution 10/1989, the CIE meeting the requirements of Council Resolution 19/1984.
Moving on thirty years, and in recognition of the importance of the scope and work of the CIE in many aspects of daily life – thus having an impact on many activities in ISO – the 1986 MoU has been updated in the form of a Partner Standards Developing Organization Agreement (PSDO). The PSDO provides new opportunities to jointly develop international standards, to serve the global community, specifically in application topics within the scope of the CIE. Currently the CIE works extensively with ISO/TC 274, the working procedures for which are supported by an Implementation Guide agreed between ISO/TC 274 and the CIE.