Are there any signed contracts between Myanmar and Thailand?

There are three (3) agreements signed between Myanmar and Thailand.They are:
(a) Trade agreement between Myanmar and Thailand  was signed On April 12 ,1989 in Yangon, Myanmar.
(b) A Memorandum of Understanding on Establishment of a joint trade committee between Myanmar and Thailand  was signed On February 2,1990 in Yangon, Myanmar.
(c) Border Trade Agreement between Myanmar and Thailand was signed On March 17, 1996  in Yangon,Myanmar.