"New instructions replace the old instructions if they conflict, Wolfgang. I'm sure even you can understand that." - CarolC

Well not so in the case of UN Security Council Resolution 1441 CarolC

"Recalling that its resolution 678 (1990) authorized Member States to use all necessary means to uphold and implement its resolution 660 (1990) of 2 August 1990 and all relevant resolutions subsequent to resolution 660 (1990) and to restore international peace and security in the area..." - Wording UN Security Council Resolution 1441.

If the substance of any "New" UNSC Resolution differed from any previous Resolution relating to the same subject it would be clearly stated that the previous resolution was void.