Conn. Gen. Stat. § 10-66hh

(b) All final calculations for grant awards pursuant to this section in an amount equal to or greater than two hundred fifty thousand dollars shall include a computation of the state grant amount amortized on a straight line basis over a ten-year period. Any state charter school which abandons, sells, leases, demolishes or otherwise redirects the use of a school building which benefited from such a grant award during such amortization period, including repayment of debt for the purchase, renovation or improvement of the building, shall refund to the state the unamortized balance of the state grant remaining as of the date that the abandonment, sale, lease, demolition or redirection occurred. The amortization period shall begin on the date the grant award is paid. A state charter school required to make a refund to the state pursuant to this subsection may request forgiveness of such refund if the building is redirected for public use.

See Sec. 10-66jj re bond authorization.