In 1999, Grief presented the "Petition to Annul the Interim Agreement" to Israel's Supreme Court claiming that the agreements between Israel and the PLO were illegal both under constitutional and criminal Israeli law. The Supreme Court called the petition "a political position" and would not deal with it. Grief drew attention to the wider scope of the 1920 San Remo conference, His thesis was that
de jure sovereignty over the entire Land of Israel (Palestine) was vested in the Jewish People as a result of the reference to the
Balfour Declaration, adopted at the
San Remo Conference in April 1920. Grief maintained that Israeli politicians and jurists, including the authors of the 2012
Levy Report failed to grasp the full importance of the "San Remo Resolution", Grief laid out his thesis in his 2008 book
The Legal Foundation and Borders of Israel under International Law. ==Published works==