One must be 21 years of age at the time of election and a qualified elector and a resident of the legislative district to serve in the Oklahoma House of Representatives. The state holds district elections every two years coincident with federal elections and special elections to fill vacant seats. The House meets from early February until the last Friday in May. Members elect a Speaker of the Oklahoma House of Representatives as the presiding officer and a Speaker Pro Tempore, who serves as the presiding officer in his or her absence. Members organize in political party-based caucuses to develop partisan policy agendas.