(A) The members of the Board of Trustees shall hold office for three years and until their successors are elected and qualified. A vacancy on the board shall be filled as provided in SDCL § 9-13-14.1 or 9-13-14.2.
(B) Whenever any third class municipality is organized, the trustees shall be elected for terms of one, two, and three years respectively at the first annual election. At subsequent elections each trustee shall be elected for a term of three years.
(SDCL § 9-7-3)