Además, la crisis de suministro de gas de estos años pasados debería no poder repetirse y el nuevo acuerdo ha de incorporar los principios de la Carta Europea de Energía que, como ya se ha dicho, es ese tratado del que, desgraciadamente, Moscú se ha retirado.
In addition, the gas supply crisis of recent years should not be allowed to recur and the new agreement must include the principles of the European Energy Charter which, as has already been said, is the treaty from which Moscow has unfortunately withdrawn.