The board shall appoint an urban county executive and fix his compensation. He shall devote his full time to the work of the county. He shall be appointed with regard to merit only, and need not be a resident of the county at the time of his appointment. No member of the board shall, during the time for which he has been elected, be chosen urban county executive, nor shall such powers be given to a person who at the same time is filling an elective office. The head of one of the departments of the county government may, however, also be appointed urban county executive.
Va. Code § 15.2-804