(a) The board of a district which has issued bonds under the provisions of this chapter, by resolution, may issue refunding bonds to replace the original bonds. The refunding bonds may be issued in any amount, in any denomination, and for any period of maturity and may bear any rate of interest provided in the board's resolution.
(b) The refunding bonds shall be issued subject to the limitations provided in this subchapter for the issuance of bonds.
(c) The refunding bonds may be exchanged for the original bonds at the original bonds' face value or at a discount, or the refunding bonds may be sold and the net proceeds applied to the purchase of the original bonds at face value or at a discount.