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So any dynamic allocation scheme may pick an unused port that happened to correspond to a port number that had been " assigned " but was currently unused . But when families cannot provide for their children , the U.N. Convention says that society should pick up the tab . Flowing water can pick up sand , silt , and clay particles , carrying them along in currents . If release of check is approved , representative of the project director or department chairman may pick up the check at the Office of Accounting . But water can pick up lead inside the home from household plumbing that is made with lead materials . Elections for a new national assembly , which in turn will pick a Council of State , which names the president and first vice president , are scheduled for 2008 .