That is one of the rules of the U.N.
Palestinian Bid for U.N. Membership Faces Near-Certain Defeat
http://www.nytimes.com/2011/11/09/world/middleeast/palestinians-united-nations-bid-faces-near-certain-defeat.html?_r=1&ref=todayspaper
Palestinian Bid for U.N. Membership Faces Near-Certain Defeat
http://www.nytimes.com/2011/11/09/world/middleeast/palestinians-united-nations-bid-faces-near-certain-defeat.html?_r=1&ref=todayspaper