replace the index used to calculate the salaries of members of the Legislature.

This bill (HB 1177) proposes to change the formula used to calculate salaries for South Dakota legislators. It would replace the current method - which ties salaries to 22% of the state's median household income (as reported by the U.S. Census Bureau) - with an unspecified new index. The bill does not specify what index would replace the current one, so the exact mechanism or impact cannot be described. The change would directly affect all members of the South Dakota Legislature by altering how their base salary is determined annually. (Note: The bill text provided does not name the replacement index, so key details are missing.)