Changes made by 2004/201/JHA: Council Decision 2004/201/JHA of 19 February 2004 on procedures for amending the Sirene Manual
EU Decision 2004/201
No changes made by 2004/201/JHA: Council Decision 2004/201/JHA of 19 February 2004 on procedures for amending the Sirene Manual are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.