Idaho Code § 31-3106
It shall be the duty of the board of county commissioners of each county, through the county budget process, as detailed in chapter 16, title 31 , Idaho Code, to fix the annual salaries of the several county officers as of and from October 1 for the next ensuing year.
[(31-3106) 1899, p. 405, sec. 3; compiled and am. R.C., sec. 2118; am. 1909, p. 220, sec. 1; am. 1911, ch. 103, sec. 1, p. 345; compiled and reen. C.L., sec. 2118; C.S., sec. 3699; am. 1929, ch. 157, sec. 4, p. 285; I.C.A., sec. 30-2606; am. 1937, ch. 73, sec. 1, p. 98; am. 1941, ch. 142, sec. 2, p. 277; am. 1943, ch. 155, sec. 1, p. 312; am. 1945, ch. 9, sec. 1, p. 12; am. 1947, ch. 78, sec. 1, p. 127; am. 1949, ch. 211, sec. 1, p. 445; am. 1951, ch. 74, sec. 1, p. 115; am. 1951, ch. 293, sec. 1, p. 649; am. 1953, ch. 117, sec. 1, p. 170; am. 1955, ch. 174, sec. 1, p. 353; am. 1957, ch. 313, sec. 1, p. 671; am. 1959, ch. 21, sec. 1, p. 50; am. 1961, ch. 4, sec. 1, p. 6; am. 1963, ch. 304, sec. 1, p. 794; am. 1967, ch. 295, sec. 1, p. 842; am. 1969, ch. 257, sec. 1, p. 793; am. 1971, ch. 110, sec. 1, p. 233; am. 1977, ch. 140, sec. 1, p. 301; am. 1979, ch. 64, sec. 1, p. 168; am. 1980, ch. 228, sec. 1, p. 510; am. 1982, ch. 191, sec. 3, p. 517.]