C.R.S. § 7-58-515

(1) Unless the articles or bylaws otherwise provide, voting by a proxy at a members meeting is prohibited. This subsection (1) does not prohibit delegate voting based on district or class. (2) If voting by a proxy is permitted, a patron member may appoint only another patron member as a proxy and, if investor members are permitted, an investor member may appoint only another investor member as a proxy. (3) The articles or bylaws may provide for the manner of and provisions governing the appointment of a proxy. (4) The articles or bylaws may provide for voting on any question by ballot delivered by mail or voting by other means on questions that are subject to vote by members.