Declas is easy for the POTUS CINC
They just do and poof insta declas
now the agencies holding the information that POTUS CINC just declas and then don't release it save with all their redactions and what not
that's a story that has yet to be fixed
maybe that's why Merrick Garland wanted, nay, needed the Mar A Lago raid. He had stuff that he declas as the executive head and they was big mad, big mad as it let the air out of their balloon