Va. Const. art. IV, § 4

Any person may be elected to the Senate who, at the time of the election, is twenty-one years of age, is a resident of the senatorial district which he is seeking to represent, and is qualified to vote for members of the General Assembly. Any person may be elected to the House of Delegates who, at the time of the election, is twenty-one years of age, is a resident of the house district which he is seeking to represent, and is qualified to vote for members of the General Assembly. A senator or delegate who moves his residence from the district for which he is elected shall thereby vacate his office. No person holding a salaried office under the government of the Commonwealth, and no judge of any court, attorney for the Commonwealth, sheriff, treasurer, assessor of taxes, commissioner of the revenue, collector of taxes, or clerk of any court shall be a member of either house of the General Assembly during his continuance in office; and his qualification as a member shall vacate any such office held by him. No person holding any office or post of profit or emolument under the United States government, or who is in the employment of such government, shall be eligible to either house.