By process, I was thinking things like, remove cover sheets, telling people it was declassified, making sure other folks with the same info get the memo that it's declassified.
Sure, the CinC could just throw a bunch of *expletive deleted*it in a box and say "poof, that box is declassified", but if the stuff inside still has a SF 703 stapled to the front of it, no one will believe him later.