Direct Tax Avoidance Agreements
USA
Article 22 - Payments received by professors, teachers and research scholars - 1. An individual who visits a Contracting State 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 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 apply to income from research only 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.