Freeze the approved content
Do not begin final output while facts are still moving. Confirm event title and date, welcome or context, running order, people and contributor notes and venue, sponsor and contact information and record the approved revision. Times, names, titles, running order, room locations and accessibility arrangements require a final authoritative source.. Run spelling, design and accessibility reviews, then save the editable .mpub before creating a PDF. A later correction needs a new proof; editing after approval without repeating review breaks the audit trail.