The location of the Eastern border between Transjordan and Iraq was considered strategic with respect to the proposed construction of what became the Kirkuk–Haifa oil pipeline. It was first set out on 2 December 1922, in a treaty to which Transjordan was not party to – the Uqair Protocol between Iraq and Nejd. It described the western end of the Iraq-Nejd boundary as "the Jebel Anazan situated in the neighbourhood of the intersection of latitude 32 degrees north longitude 39 degrees east where the Iraq-Najd boundary terminated", thereby implicitly confirming this as the point at which the Iraq-Nejd boundary became the Transjordan-Nejd boundary. This followed a proposal from Lawrence in January 1922 that Transjordan be extended to include Wadi Sirhan as far south as al-Jauf, in order to protect Britain's route to India and contain Ibn Saud.