The Belarusian Congress of Democratic Trade Union (BKDP) is one of the representative organisations of the Belarusian free trade unions. The BKDP is a strategic partner of BASTUN since 2006. 

BASTUN acts as a platform for deepened cooperation between the BKDP and trade unions in the Baltic Sea region. The aim is to maintain and help to develop the free trade union movement in Belarus according to ILO recommendations. BASTUN follows the situation in Belarus and works for keeping the Belarusian free trade unions on the political agenda in relevant national and international context.