This document defines the requirements and program for the American Welding Society (aws) to certify advanced-level 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; 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: workmanship qualification test report; face- and root-bend test report; optional aws certification tests; and welding procedure specifications. Twelve figures/tables are included. (Mn).