In a post on his Facebook page, Shwe Mann said that the move by the party’s current leadership would not deter him from engaging in active public service.
The poet was widely expected to be among the hundreds of prisoners released since the National League for Democracy took power earlier this month.
At least eight people were killed and thousands of homes damaged or destroyed by strong winds and hailstorms over the weekend.
The move would be a boost to the growing trade and tourism business in the area, says the head of Thailand’s Immigration Bureau.
The ethnic armed group said at a meeting of its new leadership last week that it would “go the way of peace” under the new NLD-led government.