 There are also the Standing Orders for each House.Of the 99 state legislative chambers in the United States (two for each state except Nebraska, which has a unicameral legislature), "Mason's Manual of Legislative Procedure" governs parliamentary procedures in 70; "Jefferson's Manual" governs 13, and "Robert's Rules of Order" governs four.The United States Senate follows the Standing Rules of the United States Senate, while the United States House of Representatives follows "Jefferson's Manual".