[MW:21700] Table 4.5 34) ---AWS D1.1

Dear All
 
                  Please explain in table 4.5 34) The omission, but not inclusion, of backing or backgouging.
 
If i have PQR qualification test CJP single V butt joint with ceramic backing.
Question.
                     1.) Can i write WPS range qualify to backing gouging CJP double V or Single V butt joint.?
                     2.) And, if i have PQR qualified with back gouging, Can i write WPS range qualify with ceramic backing or not.?
 
 
Best regard.
Sutthipong.K
QA/QC Welding.