The Scope of GATT Article XX

From para. 7.498 of the Colombia - Ports of Entry WTO panel decision, circulated Monday:

In any cases where a measure may violate a particular provision of the WTO Agreements, a number of exceptions – notably those included in Article XX of the GATT 1994 – allow WTO Members to justify a WTO-inconsistent measure.

Is the Panel's view that Article XX offers an exception to agreements other than the GATT?  Or am I reading too much into this?

ADDED:  Perhaps I should clarify this:  I meant WTO agreements other than the GATT, rather than any and all international agreements.