I think the OP is asking if the pre-signed books that Alex Ross is known for will qualify for the SS.
Alex, as least from what I've seen in years at SDCC, does not appear at the show and his books are pre-signed.
He does have SS books for sale so it's likely that his reps sent them in on his behalf for sale.
I know that in SDCC, as long as you have a CGC rep walk with you to the J. Scott Campbell booth and buy one if the pre-signed books at their booth, it did qualify for the SS grade.
Not sure if CGC had a similar arrangement with Alex Ross.
xoxo
greggy