(1) In this state there are five public service commission districts, with one commissioner elected from each district. Districts are based on the house districts submitted as part of the redistricting plan to the secretary of state pursuant to Article V, section 14, of the Montana constitution. The house districts are distributed as follows:
(a) first district: 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 43, 44, 45;
(b) second district: 39, 40, 41, 42, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62;
(c) third district: 37, 60, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79, 85, 86;
(d) fourth district: 1, 2, 6, 8, 9, 10, 12, 13, 14, 87, 88, 89, 90, 93, 94, 95, 96, 97, 98, 100; and
(e) fifth district: 3, 4, 5, 7, 11, 15, 16, 17, 18, 24, 25, 76, 80, 81, 82, 83, 84, 91, 92, 99.
(2) During a legislative session and following the receipt of the latest official final decennial census data, the legislature:
(a) shall evaluate existing commission districts;
(b) may adjust commission boundaries to comply with the United States constitution;
(c) shall prepare and adopt a final commission district map; and
(d) shall file the final commission district map with the secretary of state.