National Assembly has voted to lift martial law. Yoon (and the army) would still have to recognise it.
They previously wrote that "The National Assembly speaker has just said that South Korean troops are leaving the parliament building, the Yonhap news agency reports."
So I'm not sure if the military isn't unified in what to do, or if certain troops are just not enforcing the President's near certainly unconstitutional order. The Constitution gives the President many powers under martial law ("Under extraordinary martial law, special measures may be taken with respect to the necessity for warrants, freedom of speech, the press, assembly and association, or the powers of the Executive and the Judiciary as prescribed by law"), but it appears to give the President no powers over the National Assembly, so the "All political activities, including the activities of the National Assembly... are prohibited" part of his martial law declaration appears to be blatantly unconstitutional.
According to the constitution, "When the National Assembly requests the lifting of martial law with the concurrent vote of a majority of the total members of the National Assembly, the President shall comply." [2]
Some are saying the constitution doesn't give a timeframe for when the President has to comply, but if he doesn't soon, it definitely appears to be a self-coup. [3]
1. https://www.bbc.com/news/live/cn38321180et
2. https://www.constituteproject.org/constitution/Republic_of_K...
If the army recognises it and Yoon does not, that's still a coup d'etat. It's just that the military is siding with the National Assembly. The only way for this to consittutionally resolve is Yoon recognises it as well as the army.
If the president says "martial law", and the military says "no", that's not martial law. That's the president saying some words.
It may still be a coup d'etat attempt by the president, but it's not martial law.
So if the military recognizes the end of martial law, the martial law is over.
If Yoon recognizes it, and the military doesn't, that's a whole nother can of worms. Then it's really a coup.
Case by case. (And by redeploying problematic people out of the capital.)
