Thanks to everyone for the variety of information. As you might suspect, when I started to help my customer with welding specification issues, the primary concern was $$$$. If you've already got WPS's, PQR's and WQR's to D1.1, you hate to spend the extra money qualifying to D1.3 because someone overlooked the fact that the tubing for the job was .120 wall (which falls under D1.3) and the rest of the parts for the structure are 1/4 and 3/8". The interesting thing is that neither D1.1 nor D1.3 were actually specified on the drawing but we know where this is going and who it's for and when the parts arrive on site, "they" will catch it if not done correctly. So, we go ahead and do what's right by providing the correct documentation to cover both codes. We start testing to D1.3 on Monday.
Thanks again