As of 1993, the Inter-Parliamentary Union (IPU) has decided to be present at national electoral processes which are organized, supervised, or verified by the United Nations. IPU election-observer missions are composed of parliamentarians who observe the registration of voters, the election campaign, the casting of ballots, and the verification of the results. IPU has sent election-observer teams to Namibia (1989), Cambodia (1993), and El Salvador (1994).