ISO TC204 WG16 discussed the periodic review of the CALM M5 standard.
Beside harmonization with latest revisions of other CALM standards (e.g. ISO 21218, ISO 24102-x, ISO 21217), a major technical improvement will be to enable EPD in addition to LPD. This work considers the ISO TC204 Resolution 1072 that supports a change from LPD to EPD in the IEEE 802.11 specifications for the 5,9 GHz frequency bands.
For more details please contact the editor of ISO 21215.