The role of the RC is complicated by the fact that he/she may fulfil as many as four or five functions at a time , accompanied by multiple reporting lines , which results in considerable demands on his/her time and pressure on his/her ability to deliver . First and foremost , all RCs also serve as the UNDP Resident Representative ( UNDP-RR ) , the highest ranking UNDP representative in a country , and are thus accountable for UNDP business .