If I have Pequal Group I A36 WPS's and welders that are qualified to that, what do i need to do to weld on A572 Grade 60, group III?  I am using D1.1:2000, GMAW E70S-6, 0.045" wire.  Do I need to make new WPS's (probably) and do I need to requalify my welders (thinking no)?

Any help?