A republic in SW Arabia, on the Red Sea and the Gulf of Aden: formed in 1990 from the union of North Yemen and South Yemen: consists of arid coastal lowlands, rising to fertile upland valleys and mountains in the west and to the Hadhramaut plateau in the SE: the north and east contains part of the Great Sandy Desert. Official language: Arabic. Official religion: Muslim. Currency: riyal. Capital: San`a. Population: 16,388,000 (1998 est.). Area (including territory claimed by Yemen along the undemarcated eastern border with Saudi Arabia): 472,099 sq. km (182,278 sq. miles). Official name:Yemen Republic. See also North Yemen, South Yemen.
from Collins English Dictionary
Yemen is governed under the constitution of 1991 as amended. The president, who is head of state, is elected by popular vote for a seven-year term. The government is headed by the prime minister, who is appointed by the president. The bicameral legislature consists of the Shura Council, whose 111 members are appointed by the president, and the House of Representatives, whose 301 members are popularly elected to six-year terms. Administratively, the country is divided into 19 governorates.