As used in this chapter, unless the context otherwise requires, the following words and terms shall have the following meanings:
I. "Bond" shall mean an evidence of indebtedness issued by the governmental unit or a business and industrial development authority under this chapter to finance a project in whole or in part or to refund indebtedness incurred for that purpose and which, in the case of business and industrial development authority bonds, is payable solely from revenues, other than taxes or payments in lieu thereof, derived from such project or facility.
II. "Governing body" shall mean the board or body in which the general executive powers of the governmental unit are vested as defined in RSA 21:48.
III. "Governmental unit" shall mean a city or a town.