D1.1
If the initial procedure is considered prequalified, then a prequalified procedure could also be written with A36 to A36.
If the initial procedure did require a WPS qualification, welding ASTM 572-Gr 65 to 572-65 is qualified for Group III to Group III. Per Table 4.8 ASTM A36 to A36 (Group I to group I) would then require a new qualifiation of the WPS.
(and also check 3.1 table as Hogan mentioned. ASTM 572-65 is 80ksi, ASTM A36 is 70ksi for prequalified base metal - filler metal combo)