Legislative power resides in the Nitijela, the lower house of the Marshall Islands bicameral parliament. It consists of 33 senators elected by 24 electoral districts by universal suffrage of all citizens above 18 years of age. The electoral districts correspond roughly to each atoll of the Marshall Islands. Four district centers—Majuro, Ebeye, Jaluit, and Wotje—serve as local governments with an elected council, a mayor, appointed local officials, and a local police force. Funding for the district centers comes in the form of grants from the national government and revenues raised locally. No legal restrictions exist against the formation of political parties, and two parties currently exist.