Prior to 1994, the town also had a Presiding Supervisor, who along with the Supervisor, sat on what was then Nassau County's main governmental body, the Board of Supervisors, along with the Supervisors of the towns of North Hempstead and Oyster Bay and the independent cities of Long Beach—formerly a part of Hempstead Town until its incorporation as a separate municipality in 1922—and Glen Cove, which had been carved out of Oyster Bay Town in 1917. Typically, the Presiding Supervisor, besides chairing the weekly county Board of Supervisors meetings, acted as the senior official in the town government with the Supervisor in a more junior, subordinate role; a number of Supervisors moved up to Presiding Supervisor whenever that office became vacant, including, in succession during the 1970s, Ralph G. Caso and Francis T. Purcell, both of whom later went on to become the county executive, and then Al D'Amato, before he moved up to the Senate. Having the Presiding Supervisor on the county board along with the Supervisor gave Hempstead—by far the most populous of the county's three towns and two cities—the most clout on that body. However, in 1993–94, a federal judge ruled that the board's makeup violated the one-person, one-vote constitutional principle and also gave no representation to the country's growing minority population. As a result of that ruling, the Board of Supervisors was replaced by a 19-member county legislature. Gregory P. Peterson served as the last Presiding Supervisor, as the position was abolished with the demise of the county board.