As provided by general law, the City may own and operate a hospital or other health services, including Camden-Clark Memorial Hospital, by a board of trustees, who shall serve without compensation. Such hospital shall be operated as an entity separate from all other functions of the City and free from the operative control of Council or any executive officer or agency of the City, and under such regulations as said board may from time to time prescribe. The board shall have fifteen members, as presently constituted, with the same members and for the same terms, except that the Mayor, or his designee, from time to time, shall be an ex-officio member in the stead of a member of Council, as heretofore provided. Such board shall be otherwise self-perpetuating, but Council shall confirm or reject all persons nominated thereto by the board, as present terms expire or vacancies occur. Nothing herein contained shall be construed as prohibiting Council from providing for the operation of such facility by lease as authorized by general law; but any such lease shall contain such covenants as to reasonably assure nonprofit operation thereof in the public interest with right of termination in favor of the City in the event of breach.