The board shall meet at least twice each year, and shall adopt its own rules of procedure. A majority of trustees constitutes a quorum. At the first meeting of each fiscal year the board shall elect from the board's membership a chair and a vice chair. At least eight concurrent votes and a majority of the members present are required for a decision by the board for any of its meetings. Source: SL 1959, ch 84 , §§ 9, 10; SDC Supp 1960, §§ 15.3913, 15.3914; SL 1961, ch 255 , §§ 9 (a), 10; SL 1963, ch 285 ; SL 1965, ch 220 , §§ 7, 8; SL 1967, ch 303 , § 3 (1), (2); SDCL §§ 3-12-7, 3-12-8, 9-15-10, 9-15-17, 13-45-13, 13-45-14; SL 1968, ch 216 , § 1; SL 1974, ch 35 , § 10; SL 2012, ch 26 , § 7; SL 2016, ch 31 , § 1; SDCL § 3-12-52 ; SL 2019, ch 22 , § 1.