Rex was Premier of Niue from its establishment as a self-governing territory on 19 October 1974 until his death in 1992. Upon his death in office, he was succeeded by Mititaiagimene
Young Vivian, until General Elections the following year resulted in the election of
Frank Fakaotimanava Lui into office. Having served 18 years in office, he is Niue's longest serving Premier. Although Rex was opposed to party politics on Niue, he was supported by the
Niue People's Action Party after its formation in 1987. During his almost two decades in office, Rex held virtually all Government ministerial portfolios from time to time. His Cabinet of Ministers included prominent Niuean figures such as Dr
Enetama Lipitoa, Mititaiagimene
Young Vivian and
Frank Fakaotimanava Lui, the latter two also going on to become Premiers of Niue. ==Honours==