DT4169 - DT: Bulgaria: double taxation agreement, Article 20: Teachers

1. An individual who visits one of the Contracting States for a period not exceeding two years for the purpose of teaching or engaging in research at a university, college or other recognised educational institution in that Contracting State and who was immediately before that visit a resident of the other Contracting State, shall be exempted from tax by the first-mentioned Contracting State on any remuneration for such teaching or research for a period not exceeding two years from the date he first visits that State for such purpose.
   
   
2. This Article shall only apply to income from research if such research is undertaken by the individual in the public interest and not primarily for the benefit of some other private person or persons.