Any insurer may make and invest in student loans guaranteed or reinsured as to principal and interest by a state or federally sponsored higher education assistance corporation, to the extent of such guaranty or reinsurance, or by a private nonprofit or for profit student loan insurance guarantor or reinsurer which has net worth of not less than Thirty-five Million Dollars ($35,000,000.00) and which has a financial rating of BBB or better from Standard and Poor's or Moody's rating agencies. Any investment pursuant to this section shall not exceed, except with the consent of the Insurance Commissioner of this state, twenty-five percent (25%) of the insurer's net admitted assets based upon the insurer's most recent financial statement filed with the Insurance Commissioner's office.