This document defines the requirements and program for the American Welding Society to certify expert welders through an evaluation process entailing performance qualification and practical knowledge tests requiring the use of advanced reading, computational, and manual skills. The following items are included: statement of the standard's scope; definitions of key terms; requirements for participating organizations; education and work experience requirements; purposes/scope of the written examinations and performance tests; inspection, testing, and acceptance criteria; documentation requirement; certification procedure; and information about the National Registry of Level II-Advanced Welders. Appended are the following: visual inspection test report; face- and root-bend test report; and welding procedure specifications. Twelve figures/tables are included. (MN)