(1) In addition to the regular salary and mileage provided by law, an expense allowance equal to the maximum daily expense rate allowable to employees of the federal government for travel in the high rate geographical area of Jackson, Mississippi, as may be established by federal regulations for each legislative day in actual attendance at a session shall be paid to the Lieutenant Governor and members of the Senate and House of Representatives, together with an additional mileage allowance as provided by Section 25-3-41, for each mile of the distance by the most direct route usually traveled in coming to and returning from the place where the Legislature is in session, which expense allowance and additional mileage allowance shall be paid at the end of each seven-day period while the Legislature is in session.

(2) In addition to the mileage allowance provided for in subsection (1) of this section, an expense allowance equal to the maximum daily expense rate allowable to employees of the federal government for travel in the high rate geographical area of Jackson, Mississippi, as may be established by federal regulations, per day, shall be paid to:

(a) The Lieutenant Governor and members of the Senate, upon the approval of the Senate Rules Committee, for attending to legislative duties on any of the following days that the Senate does not convene in session on that day: (i) any day between legislative regular or extraordinary sessions, or (ii) any day of a legislative regular session that has been extended beyond the number of calendar days specified in Section 36, Mississippi Constitution of 1890, when that day falls after the ninetieth or one-hundred-twenty-fifth day of the session, as the case may be, or (iii) any day during a legislative extraordinary session; and

(b) Members of the House of Representatives, upon the approval of the House Management Committee, for attending to legislative duties on any of the following days that the House does not convene in session on that day: (i) any day between legislative regular or extraordinary sessions, or (ii) any day of a legislative regular session that has been extended beyond the number of calendar days specified in Section 36, Mississippi Constitution of 1890, when that day falls after the ninetieth or one-hundred-twenty-fifth day of the session, as the case may be, or (iii) any day during a legislative extraordinary session.

(3) The expense allowance and additional mileage allowance provided by this section for the Lieutenant Governor and members of the Senate shall be paid from the appropriate legislative fund of the Senate as provided by law, and the expense allowance and additional mileage allowance for members of the House of Representatives shall be paid from the appropriate legislative fund of the House of Representatives as provided by law, upon warrants drawn for such purpose in the manner provided by law.