Direct Tax Avoidance Agreements
SUDAN
Article 20 : Professors, teachers and research scholars- 1. A professor, teacher or research scholar who is or was a resident of the Contracting State immediately before visiting the other Contracting State for the purpose of teaching or engaging in research, or both, at a university, college or other similar institution in that other Contracting State shall be exempt from tax in that other State on any remuneration for such teaching or research for a period not exceeding two years from the date of his arrival in that other State.
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 private person or persons.
3. For the purposes of this Article, an individual shall be deemed to be a resident of a Contracting State if he is resident in that State in the fiscal year in which he visits the other Contracting State or in the immediately preceding fiscal year.