C.R.S. § 24-44-106

(1) The commission shall meet quarterly and at any other such time as it deems necessary. Meetings may be called by the chairperson or by a petition signed by a majority of the voting members of the commission. Ten days’ notice shall be given in writing prior to the meeting date. (2) Two voting Indian members of the commission and two voting members serving by virtue of their office within state government constitute a quorum. (3) Proxy voting is not permitted.