"Palestinian territories" and "occupied Palestinian territories" (OPT or oPt) are descriptions often used to describe the West Bank (including East Jerusalem) and the Gaza Strip which are occupied or otherwise under the control of Israel. Israeli governments have maintained that the area involved is within territorial dispute. The extent of the territories, while subject to future negotiations, have frequently been defined by the Green Line. The term "Palestinian Territory, Occupied" had been utilized by the UN and other international organizations between 1998 to 2013 in order to refer to the Palestinian National Authority; it was replaced in UN Secretariat communications by the term State of Palestine starting in 2012, and the   ISO adopted the name change in 2013. However, as of August 2015, the UN Security Council continues to treat Palestine as a non-sovereign entity, which also prevents its admission to UN General Assembly membership.