C.R.S. § 11-30-112: Capital.

The capital of a credit union consists of the payments that have been made to it in shares by the several members of the credit union. The credit union has a lien on the shares and deposits of a member for any sum due to the credit union from the member or for any loan endorsed by the member. A credit union may charge an entrance fee and an annual membership fee, but the fees must be uniform to all members.