[The Town Board of the Town of Hamptonburgh of the State of New York elects to participate as a participating employer in the State Employees Health Insurance Plan and to include in such plan its officers and employees (and retired officers and employees), subject to and in accordance with the provisions of the State Health Insurance Plan, as presently existing or hereinafter amended, together with such provisions of the insurance contracts as may be approved by the President of the Civil Service Commission and any administrative rule or direction governing the plan.]