The Alabama House of Representatives is comprised of 105 members. Each member represents a district of approximately 40,000 people. The members of the House are elected to four-year terms. Members of the House must be 21 years of age at the time of their election, and must have been citizens of Alabama for three years, having lived in their respective districts for at least one year immediately preceding their election. The Speaker of the House represents one of the 105 districts in the House, and is elected by his or her colleagues to serve as the presiding officer. It takes a quorum of 53 members to conduct business in the Alabama House of Representatives, and a majority of a quorum can pass any bill except a constitutional amendment, which requires 63 votes. During a special legislative session any measures not included in the Governor's call require a 2/3 majority for passage. All revenue raising legislation must originate in the House just as in the Congress of the United States. An appropriation to a non-government organization, such as a private college, requires a two-thirds vote of those elected.