(a) An interest subsidy grant approved under sections 10-292c to 10-292n, inclusive, shall be paid in installments, the number and time of payment of which shall correspond to the number and time of interest installment payments on municipal bonds, including payments to retire temporary notes renewed for the third and subsequent years pursuant to § 7-378a or 7-378e issued for the purpose of financing the school building project to which such interest subsidy grant relates and shall be equal to the state’s share of interest costs per interest installment on municipal bonds or notes, provided final payment shall not be made prior to an audit conducted by the State Board of Education. Annual interest subsidy grant installments paid pursuant to this section on interest installment payments to retire temporary notes renewed pursuant to said § 7-378a or 7-378e shall be paid only if at the time such temporary notes are renewed, the rate of interest applicable to such notes is less than the rate of interest that would be applicable with respect to twenty-year bonds if issued at the time of such renewal. The determination related to such rates of interest pursuant to this subsection may be reviewed and shall be subject to approval by the Commissioner of Education prior to renewal of such notes.

(b) If the commissioner determines that a school building project has not met the approved conditions of the original application, the State Board of Education may withhold subsequent state interest subsidy grant payments related to said school building project until appropriate action, as determined by the commissioner, is taken to cause the school building project to be in compliance with the approved conditions or may require repayment of all state interest subsidy grant payments for said school building project when such appropriate action is not undertaken within a reasonable time.