There shall be two regular sessions of the Legislature held each year, each session to last 45 days, the first session to begin on the second Monday in January each year and the second session to begin on the second Monday in July of each year. The Legislature may meet in special session at the call of the Governor who shall set the time for the beginning of such session and the number of days it may last. Amended H.J.R. No. 1, adopted Feb. 18, 1977, approved by voters Nov. 7, 1978, approved by Sec. of Int. Mar. 1, 1979; amended 1971 S.J.R. No. 3, effective March 19, 1971.