The Agreement between the Kingdom of Thailand and the Kingdom of Belgium for the Avoidance of Double Taxation with respect to Taxes on Income and on Capital was signed on 16th October 1978 and the instruments of ratification were exchanged on 28th November 1980.
Under Article 29, this Agreement shall apply in Thailand :
1. in respect of taxes on income in the calendar years or accounting periods commencing on or ofter 1st January 1980,
2. in respect of taxes on capital for amounts paid on or after 1st January 1980. | 
