KATHMANDU, Nepal, Dhu-AlHijjah 25, 1436, Oct 9, 2015, SPA -- Nepal's parliament speaker has announced that members will vote Sunday to choose a new prime minister of this Himalayan nation, AP reported. Speaker Subash Nemwang announced Friday that candidates will be able to file nominations on Saturday. A candidate will have to secure a simple majority to win. The current prime minister, Sushil Koirala, is stepping down as required by the new constitution that was adopted last month. --SPA 13:33 LOCAL TIME 10:33 GMT www.spa.gov.sa/w