AISC Specification 360-05, Section A3 para 5 references AWS A5.1 thru A5.32 for filler metal and flux for welding.
AISC Specification 341-05 Siesmic Provisions, Appendix W covers welding but is primarily concerned with just welding and I don't see any reference to filler metals or flux. Section W6.2 addresses filler metal packaging but the rest just seems to be welding performance requirements. Appendix X also covers welding. X1 references AWS A5.01, ABS (American Bureau of Shipping), Lloyds Register of Shipping, ASME, US Dept. of Defense, or a quality assurance program acceptasble to the engineer of record.