§ 242. _Election of county officers. If a majority of all votes cast on such proposition be affirmative, there shall be elected in the county at the next succeeding general election, in the same manner as are other county officers, five officers to be known as county supervisors. The said county supervisors shall hold office for a term of three years, commencing at noon on the first day of January next succeeding their election; provided, however, that of those elected at the first election under this article two shall hold office for one year, two for two years, and one for three years, the designation whereof shall be made on the election ballot._ § 243. _County supervisors; qualifications; vacancies and removals. County supervisors shall be electors of the county. When a vacancy shall occur, otherwise than by expiration of term, in the office of county supervisor, the same shall be filled for the remainder of the unexpired term at the next general election happening not less than three months after such vacancy occurs; and until such vacancy shall be filled the governor shall fill such vacancy by appointment. A county officer may be removed by the governor in the same manner as a sheriff._ § 244. _The board of supervisors; organization, powers, compensation of members. The county supervisors in each county adopting this article shall constitute the board of supervisors of such county and the powers and duties conferred and imposed upon the board of supervisors and the officers and committees thereof in any general or special law are hereby devolved upon the board so constituted, together with such other powers, duties and responsibilities as may be conferred upon them by law, to be exercised subject to the provisions of this article. When the county supervisors elected within such county shall have qualified the supervisors of the several towns and wards of cities within the county shall cease to convene as a board of supervisors or to exercise any of the powers and duties required to be exercised by the board of supervisors of the county. The board shall elect one of its number president, whose powers and duties shall be determined by said board, and shall adopt rules for the conduct of its business. Each member of the board shall receive an annual compensation not to exceed five hundred dollars, the amount of which shall be determined by the said board for attendance upon each of its meetings, provided, that the total amount shall not exceed five hundred dollars. Such compensation shall be a county charge and in addition to the actual necessary expenses incurred for transportation in going to and from the meetings of the board._ § 245. _Election officers. No person who shall hold or be elected to any elective county office at or before the election at which this article is adopted shall be removed therefrom under authority of this article before the expiration of the term for which he was elected or appointed to fill a vacancy._