The 1949 Armistice Agreement - armistice lines are NOT borders

'The Armistice Demarcation Lines defined in articles V and VI of this Agreement are agreed upon by the Parties without prejudice to future territorial settlements or boundary lines or to claims of either Party relating thereto.'

More here http://israeljewsjudaism.blogspot.co.uk/2013/07/the-1949-armistice-agreement.html

Remember that the next time the BBC or other anti-Israel organisation refers to 'a return to pre 1967 borders'.