Some commentators say that there is a specific written procedure involved for a president to declassify documents.
Other commentators say that the president can verbally declare that certain documents are Declassified.
There are disagreements as to whether he actually did go through any process to declassify the documents. I’m sure that point of order will be the subject of more legal proceedings
until trump did it and a compliant archivist figured out a way to mis apply policy and procedure to the president who is truly “above the law”... and make it seem like “well it shoulda been codified” and now “we have an EO for that in our department these days... ex poste facto style”.