Doing a simple google search on ISO 5840-2: 2015 I find out that this document is managed by the
ISO/TC 150/SC2 ; if you open the page, there is a link to their
in the Working Area, they have a
folder with "public information", i.e., documents from that subcommittee that are available to the "general public" but, as you can see for yourself, the type of information you are seeking is not there. In my experience, ISO Technical Committees and their subcommittees, working groups, task forces, etc...are not transparent, for both good and bad reasons. Some of the bad reasons include the fact that some of the consultants and corporation representatives keep information close to their vests for commercial gains.
Also, please note that, according to the ISO website, this document is under a new revision cycle and the DIS (Draft of International Standard) is available for purchase from ISO.
