re: Neil Gorsuch’s former law clerk says Trump has constitutional authority to declassify

quote:

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Mr. Trump had a ‘standing order’ during his presidency that ‘documents removed from the Oval Office and taken to the residence were deemed to be declassified the moment he removed them

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While the validity of such a “standing order“ is apparently open to question, let’s assume that that it would indeed be valid.

Again, where is the documentation of this “standing order?”