I believe your procedures are qualified for any joint details and welding parameters that fall within the ranges and conditions listed in Table 4.5 (I happen to be looking at D1.1-2004).
That being the case, you are qualified for any of the prequalified joint details as defined by clauses 3.12 (partial joint penetration groove welds) and 3.13 (complete joint penetration groove welds), or within the tolerances of figure 5.3 for grooves that are not prequalified, and fillets. You can weld with or without backing or back gouging.
I apologize for the delay in getting back to you with an answer.
Best regards - Al