Please answer the following question: Information: - The North Atlantic Treaty Organization (NATO '), also called the North Atlantic Alliance, is an intergovernmental military alliance based on the North Atlantic Treaty which was signed on 4April 1949. The organization constitutes a system of collective defence whereby its member states agree to mutual defence in response to an attack by any external party. Three NATO members are permanent members of the United Nations Security Council with the power to veto and are officially nuclear-weapon states: the United States, France and the United Kingdom. NATO's headquarters are located in Haren, Brussels, Belgium, where the Supreme Allied Commander also resides. Belgium is one of the 28 member states across North America and Europe, the newest of which, Albania and Croatia, joined in April 2009. An additional 22countries participate in NATO's Partnership for Peace program, with 15other countries involved in institutionalized dialogue programmes. The combined military spending of all NATO members constitutes over 70% of the global total. Members' defence spending is supposed to amount to 2% of GDP. - The North Atlantic Council ( NAC ) is the principal political decision - making body of the North Atlantic Treaty Organization ( NATO ) , consisting of Permanent Representatives from its member countries . It was established by Article 9 of the North Atlantic Treaty and it is the only body in NATO that derives its authority explicitly from the Treaty . - The North Atlantic Treaty, signed in Washington, D.C. on 4 April 1949, is the treaty establishing the North Atlantic Treaty Organization (NATO). What entity does 'north atlantic council' has the relation 'inception' with?
A:
4 april 1949