If we anticipate landing with less than 7T (a lot on the 330) we go through the motions of the actual ECAM which involves ensuring that the fuel scheduling has moved the tip and tail fuel to the main wing tanks
.... I would have thought that this was a procedure and not a policy!
As far as policies are concerned, look at FAR121 or JAR OPS etc... we all have to play by the rules.....
Mutt