Us uk tax treaty article 20A
I lived in the UK for more than 4 years before I moved to the US for doing a postdoctoral research here. I was a resident in the UK before I come to the US. According to the US/UK income tax treaty (see below), I think I should be eligible for the benefit. Therefore, I was trying to apply for it, but my institute refuses to offer me the benefit because I am not an UK permanent resident. However, I read the US/UK tax treaty article 20A (see below). It only says that "who was immediately before that visit a resident of the other Contracting State". It doesn't say that I have to be a permanent resident or a citizen of the UK. If anyone has the same experience or any advice would be very appreciated.
Article 20A: Teachers
1. A professor or teacher 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.