Colo. Rev. Stat. § 10-3-239
Domestic insurance companies may borrow and thereby assume a liability for the repayment of a sum of money upon a written agreement that the loan or advance with interest shall be repaid only out of surplus of the company in excess of such minimum surplus as is stipulated in and by the agreement. The agreement shall first be submitted to and approved by the commissioner. Repayment of principal or payment of interest may be made only with the approval of the commissioner when he is satisfied that the financial condition of the company warrants such action, but such approval may not be withheld if the company has and submits satisfactory evidence of surplus of not less than the amount stipulated in the repayment of principal or interest clause of the agreement. No loan or advance made under the provisions of this section or interest accruing thereon shall form a part of the legal liabilities of the company until authorized for payment by the commissioner, but, until such authorization, all statements published by the company or filed with the commissioner shall show the amount thereof then remaining as a special surplus account. Nothing in this section shall be construed to mean that a company may not otherwise borrow money, but the amount so borrowed with accrued interest thereon shall be carried by the company as a liability.
C.R.S. § 10-3-239
For financial statements that must be filed, see § 10-3-208.