Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Voters in Tanzania's Zanzibar Cast Ballots on Referendum Constitutional amendment would allow rival parties to form coalition government VOA News 31 July 2010 Voters in Tanzania's semi-autonomous region of Zanzibar are casting ballots on a constitutional amendment that would allow rival parties to form a coalition government. Officials said Saturday voting was proceeding peacefully and they hoped for a large turnout from the around 400,000 eligible voters. The referendum is designed to end years of political strife that has marred previous elections. Under the plan, two vice presidential positions would be created that would be split between the leading parties in parliamentary elections. President Amani Karume and other members of his ruling CCM party have urged residents to vote "yes" to the referendum. The measure has also gained support from leaders of the main opposition party, CUF. Zanzibar gained independence from Britain in 1963, then united with Tanganyika the following year to form what became the republic of Tanzania. Some information for this report was provided by AFP and Reuters. .