The candidate must specify to which code they wish to test from the available code subjects.
The current available code subjects are (as of 5/2016 - see most up-to-date Body of Knowledge to verify current available code subjects
http://www.aws.org/library/doclib/BodyOfKnowledge.pdf) :
AWS D1.1 - Structural Steel Code: 2015 Edition including 2nd Printing (Code Clinic available)
API 1104 - Pipelines 20th or 21st Editions (Code Clinic available)
Code clinic available only for 20th
edition with Errata /Addendum July 2007, Errata 2
December 2008/ Errata 1 April 2014
AWS D1.2 - Structural Aluminum Code: 2014 Edition
AWS D1.5 - Bridge Welding Code: 2015 Edition (including Clause 12)
AWS D15.1 - Railroad: 2012 Edition
AWS D17.1 - Aerospace: 2010 w/ Errata and Amendment
ASME Sec IX: 2015 Edition, B31.1 (2014) & B31.3 (2012)
ASME Sec VIII (Div 1) & ASME Sec IX: 2015 Editions