Aha! I see where the confusion lies. Out of context, those paragraphs* could possibly be interpreted as GC rules no longer applying to those wishing to remove occupiers from their own country.

Except that if you actually read those whole sections in the actual DoD Law of War Manual, it is extremely clear that it is providing rules for the occupying force in other countries (in this case, US forces elsewhere), and provides that the GC rules apply to the occupying [US] forces for one year officially, and thereafter, at least partially or unofficially.

But thank you so much for helping me see why people are falling for this nonsense.

* Edit: actually the last sentence quoted there at least hints at all this being interpreted incorrectly as it clearly continues to bind the occupying force to the "following" (but omitted here, of course) GC rules.

* Edit2: Also none of this says anything about covert occupations or anyone having to reveal themselves or their intentions after one year.