C.R.S. § 35-75-123

All banks, bankers, trust companies, savings and loan associations, investment companies, insurance companies and associations, executors, administrators, guardians, trustees, and other fiduciaries may legally invest any sinking funds, moneys, or other funds belonging to them or within their control in any bonds issued pursuant to this article. Public entities, as defined in section 24-75-601 (1), C.R.S., may invest public funds in such bonds only if said bonds satisfy the investment requirements established in part 6 of article 75 of title 24 , C.R.S.