Each district shall have power and is authorized from time to time to issue its negotiable bonds in anticipation of the revenues from an enterprise. Said bonds may be issued for any corporate purpose or purposes of such district. Said bonds shall be authorized by resolution of the board of such district and may be issued in one or more series, may bear such date or dates, mature at such time or times not exceeding 40 years from their respective dates, bear interest at such rate or rates, not exceeding six percent per annum, payable semiannually, be in such denominations, be in such form, either coupon or registered, be executed in such manner, be payable in such medium of payment, at such place or places and be subject to such terms of redemption, with or without premium, be declared or become due before the maturity date thereof, as such resolution or resolutions may provide. Said bonds may be issued for money or property (at public or private sale for such price or prices) as the board shall determine, provided that the interest cost to maturity of the money or property (at its value as determined by such board, the determination of which shall be conclusive) received for any issue of said bonds shall not exceed six percent per annum, payable semiannually. Said bonds may be repurchased by the district out of any funds available for such purpose at a price not more than the principal amount thereof and accrued interest, and all bonds so repurchased shall be cancelled. Pending the preparation or execution of definitive bonds, interim receipts or certificates or temporary bonds may be delivered to the purchaser of said bonds.