Section 503 - County jury board(a) There shall be established for each county a jury board composed as follows: 1. In counties outside cities having a population of one million or more, except in the counties of Albany, Westchester, Suffolk and Nassau, the county jury board shall consist of one justice of the supreme court residing in the county, or if there is no justice residing therein, a justice residing in the judicial district embracing the county to be designated by the appropriate appellate division, who shall act as chairman; the judge of the county court, or if there be more than one, then the senior county judge; and a member of the county legislature to be designated by the county legislature, provided that no such member of the county legislature shall be designated if he engages in the practice of law.2. In the county of Albany, the county jury board shall consist of the county judge, the surrogate and a member of the county legislature, all to be designated in the manner provided in subdivision one of this section. In the county of Westchester, the county jury board shall consist of the administrative judge of the ninth judicial district if he be a resident of Westchester County, and if not, the senior resident justice of the supreme court; the senior county judge; and the county executive. In the counties of Nassau and Suffolk, the county jury board shall consist of the justices of the supreme court residing in the county, the surrogate and the judges of the county court.3. In counties within cities having a population of one million or more, the county jury board shall consist of the presiding justice of the appellate division of the judicial department embracing the county, or his designee from among the justices of the supreme court; two justices of the supreme court residing in the county to be designated by the appellate division of such department; and the county clerk of the county.(b) The county jury board shall meet at least annually and at such additional times as may be necessary to carry out the purposes of this article. The commissioner of jurors shall act as secretary to the county jury board.