DUBAI (AFP) - Voters chosen by the rulers of the United Arab Emirates began casting their ballots on Saturday in only the second-ever polls to elect half of the members of the powerless Federal National Council. Men dressed in traditional Emirati white gowns and women wearing black abaya cloaks trickled into a large polling centre at a conventions complex in Dubai. They chose their preferred candidates using electronic terminals in semi-private booths, before depositing the printed out votes in transparent boxes. Polling stations opened at 08:00 (0400 GMT) and will close at 7:00 pm. Some 129,000 Emirati citizens are eligible to elect 20 representatives out of 450 candidates, including some 85 women.