Regulation number 809/2004 of the European Commission. This Regulation specifies details of the form and content of a prospectus (www.practicallaw.com/5-107-7072) as required by the Prospectus Directive (www.practicallaw.com/8-200-9274).
For further details, see Practice note, Prospectus Directive: overview (www.practicallaw.com/2-503-7573).