Freeze the approved content
Do not begin final output while facts are still moving. Confirm subject and scope, short overview, key facts or figures, practical implications and source, owner and contact details and record the approved revision. Claims, dates, measurements, statistics, citations and contact details need sources and an explicit review date.. 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.