(a) Members of the Legislature shall receive from the Public Treasury a salary of Six Hundred Dollars ($600) per month, unless a greater amount is recommended by the Texas Ethics Commission and approved by the voters of this State in which case the salary is that amount. Each member shall also receive a per diem set by the Texas Ethics Commission for each day during each Regular and Special Session of the Legislature.
(b) No Regular Session shall be of longer duration than one hundred and forty (140) days.

(c) In addition to the per diem the Members of each House shall be entitled to mileage at the same rate as prescribed by law for employees of the State of Texas.