Colorado constitution
Article V
Section 7

Section 7. General assembly ­ shall meet when ­ term of members ­ committees. The general assembly shall meet in regular session at 10 a.m. no later than the second Wednesday of January of each year. The general assembly shall meet at other times when convened in special session by the governor pursuant to section 9 of article IV of this constitution or by written request by two­thirds of the members of each house to the presiding officer of each house to consider only those subjects specified in such request. The term of service of the members of the general assembly shall begin on the convening of the first regular session of the general assembly next after their election. The committees of the general assembly, unless otherwise provided by the general assembly, shall expire on the convening of the first regular session after a general election. Regular sessions of the general assembly shall not exceed one hundred twenty calendar days.