Comment period start date: 2017-08-07
Comment period end date: 2017-10-10
Proposals on BS 45004: https://standardsdevelopment.bsigroup.com/projects/3a879651ac6d2e245e7c31aa0efebab9
Public Comments start date: 2017-03-13
Public Comments end date: 2017-05-24
2017-05-06: The text seems not to be accessible.
See also: http://blog.psybel.de/stichwort/iso-45001-english/
I don’t know whether any 45004 standard will be necessary. As far as I understand, ISO 45001 already will include guidelines.