Sec. 23. (a) "Public funds" means money:
(1) derived from the revenue sources of the governmental body; and
(2) deposited into the general or a special fund of the governmental body.
(b) The term does not include either of the following:
(1) Money received by a person under an authorized public-private agreement under IC 5-23.
(2) Proceeds of bonds payable exclusively by, or used by, a private entity.