(a) Cash;
(b) Securities listed by the Securities Valuation Office of the National Association of Insurance Commissioners, including those deemed exempt from filing as defined by the Purposes and Procedures Manual of the Securities Valuation Office, and qualifying as admitted assets;
(c)
(i) Clean, irrevocable, unconditional letters of credit, issued or confirmed by a qualified United States financial institution, as defined in paragraph (a) of Section 83-19-155, effective no later than December 31 in respect of the year for which filing is being made, and in the possession of, or in trust for, the ceding insurer on or before the filing date of its annual statement.
(ii) Letters of credit meeting applicable standards of issuer acceptability as of the dates of their issuance or confirmation shall, notwithstanding the issuing or confirming institution’s subsequent failure to meet applicable standards of issuer acceptability, continue to be acceptable as security until their expiration, extension, renewal, modification or amendment, whichever first occurs; or
(d) Any other form of security acceptable to the commissioner.