Principal amount, use of sinking and reserve funds

(a) The total amount of refunding bonds to be issued under this chapter shall be an amount sufficient to effect the refunding and may include an amount sufficient to pay (1) the principal amount outstanding of the bonds to be refunded, (2) interest accrued or to accrue to the date of maturity or the date of redemption of the bonds to be refunded (which need not necessarily be on the first available redemption date), (3) any redemption premiums to be paid thereon, (4) any reasonable expenses incurred in connection with such refunding and (5) any other reasonable costs deemed appropriate by the state, including without limitation, the expenses of preparing and delivering the refunding bonds, legal fees, financial advisor fees, consultant fees, and other expenses incurred in connection with the issuance, sale and delivery of the refunding bonds. (b) Any money in a sinking fund or reserve fund or other fund for the bonds to be refunded may be used to pay the principal of, premium, if any, or interest on the outstanding bonds to be refunded or may be deposited in a sinking fund or reserve fund or other fund for the refunding bonds.