Airbus procedure : ask clearance before emergency descent ?
About 2 years ago I came across a synoptic list of changes in Airbus procedures, and one of them required pilots to ask for ATC clearance to initiate an emergency descent . Can someone direct me to where this issue is reflected in any airbus manual since I cannot find it ?
(P.S : Such procedure is already ask by in i.e the German airspace rules and regulations , it could be the case that Airbus took such issue and incorporated it in its procedure)