A330/A340 Sub Type Question

[A340600MAN]

Hi

I have been looking on the Airbus website and the type certificate for both types

http://www.easa.europa.eu/certificat...S-A.004_Airbus_330-33-14112012.pdf

and nowhere does it state the 'X' or 'E' on any of the aircraft types.

Do Airbus actually recognize these designations?

Len