It's one of those offical letters from any Thai Government Agencies. While it does state that it affects the AOC affects Orient Thai and One-Two-Go, it also says that it concerns MD 80 operations.
Do they have AOC for different types of aircrafts?
This leaves Udom with a legal loophole to continue to operate other aircrafts. Can they do anything? Not really. Coz if they go against him, he could file a suit in one of the courts (administrative court?) that the order issued by the DCA is confusing/not clear/wrong.
Problem solved for both: DCA saves its face with the order. Udom can fly his 747s and save some money for not having to fly the MD80s. And the way I judge him he will not have to pay any salaries to his staff as most of them are on a one or three month contract allowing him to avoid any employment laws.