The corporation may determine to make long term loans approved on or after July 1, 1978, for any economic development project located in an area of high unemployment financed with the proceeds of bonds at an interest rate which is substantially equal to the interest rate payable on such bonds adjusted to reflect issuance costs. The corporation may also determine not to charge mortgage insurance premiums with respect to mortgage loans approved on or after July 1, 1978, for any economic development project located in an area of high unemployment the payments on which are insured pursuant to § 32-16. Any such determination shall apply to all loans made and mortgages insured during the period the determination is in force and, once applicable to a loan or mortgage, shall remain applicable for the full term of the loan or mortgage. The corporation may rescind any such determination at any time if the corporation finds in its sole judgment that the rescinding of the determination may be necessary in order to preserve the financial integrity of the corporation or the insurance fund. This section shall not apply to any other fees or charges imposed by the corporation, including without limitation application, acceptance, commitment, special purpose, bond issuance and attorney’s fees, which may be charged without regard to the location of the proposed economic development project.