 The government of Singapore underwent several significant changes . Non @-@ Constituency Members of Parliament were introduced in 1984 to allow up to three losing candidates from opposition parties to be appointed as MPs . Group Representation Constituencies ( GRCs ) was introduced in 1988 to create multi @-@ seat electoral divisions , intended to ensure minority representation in parliament . Nominated Members of Parliament were introduced in 1990 to allow non @-@ elected non @-@ partisan MPs . The Constitution was amended in 1991 to provide for an Elected President who has veto power in the use of national reserves and appointments to public office . The opposition parties have complained that the GRC system has made it difficult for them to gain a foothold in parliamentary elections in Singapore , and the plurality voting system tends to exclude minority parties . 
