President Bush noted in an April 14, 2002 Memorandum which came to be called "the Bush Roadmap" (and which established the parameters for subsequent Israel-Palestinian negotiations) the need to take into account changed "realities on the ground, including already existing major Israeli population centers", as well as Israel's security concerns, asserting that "It is unrealistic to expect that the outcome of final status negotiations will be full and complete return to the armistice lines of 1949." He later emphasized that, within these parameters, details of the borders were subjects for negotiations between the parties.