When will the fourth edition be published?
ISO has not published a date. The DIS ballot opened on 17 September 2026 and runs twelve weeks. The planning date on this site, 16 September 2027, is an outer estimate, not an ISO date. The recorded stage date is the fact that moves the plan.
The recorded stage
ISO has not published a date. The DIS ballot opened on 17 September 2026 and runs twelve weeks. The planning date on this site, 16 September 2027, is an outer estimate, not an ISO date. The recorded stage date is the fact that moves the plan.
The ballot
ISO has not published a date. The DIS ballot opened on 17 September 2026 and runs twelve weeks. The planning date on this site, 16 September 2027, is an outer estimate, not an ISO date. The recorded stage date is the fact that moves the plan.
Why the planning date is an estimate
ISO has not published a date. The DIS ballot opened on 17 September 2026 and runs twelve weeks. The planning date on this site, 16 September 2027, is an outer estimate, not an ISO date. The recorded stage date is the fact that moves the plan.
Questions
What stage is it at?
Stage 40.20, DIS ballot initiated for 12 weeks, recorded on 17 September 2026.
What comes next?
Close of voting, then approval, then publication. ISO has recorded none of those dates.
Not legal advice; does not certify. The full record is at the requirement record.