Should an earlier roadmap be ignored?

No. It can explain programme development, but mandatory planning should identify the current legal and official basis.

How often should sources be reviewed?

Review at project start, design sign-off, test entry and before go-live, and whenever OTA or Fawtara publishes an update.

Source URL, publisher, publication date, review date, requirement, affected process, owner and implementation evidence.

Yes. Technical guidance can evolve, so projects need version control and change assessment.

Oman e-invoicing

Distinguish the dates in Decision 189/2026 from earlier Fawtara programme phases.