(1)    The authority may issue its negotiable notes and bonds in such principal amount, as, in the opinion of the authority, is necessary to provide sufficient funds for achieving its corporate purposes, including the purchase of certain mortgages and securities and the making of secured loans for low- and moderate-income housing, for the rehabilitation of existing structures and for the construction of facilities appurtenant thereto as provided in this chapter; for the making of secured loans to assist eligible elderly homeowners in paying property taxes and special assessments; for the payment of interest on notes and bonds of the authority during construction; for the establishment of reserves to secure such notes and bonds; for the provision of moneys for the housing development fund in order to make temporary loans to sponsors of housing projects as provided in this chapter; and for all other expenditures of the authority incident to and necessary or convenient to carry out its corporate purposes and powers.

   (2)   The authority may issue renewal notes, issue bonds to pay notes and whenever it deems refunding expedient, refund any bonds by the issuance of new bonds, whether the bonds to be refunded have or have not matured, and issue bonds partly to refund bonds then outstanding and partly for any other purpose. The refunding bonds shall be sold and the proceeds applied to the purchase, redemption or payment of the bonds to be refunded.

   (3)   Except as may otherwise be expressly provided by the authority, every issue of its notes or bonds shall be general obligations of the authority payable out of any revenues or moneys of the authority, subject only to any agreements with the holders of particular notes or bonds pledging any particular receipts or revenues.

   (4)   All notes or bonds shall be negotiable investment securities under ch. 408.

   (5)   This section does not supersede or impair the power of the Wisconsin Economic Development Corporation to carry out its program responsibilities relating to economic development which are funded by bonds or notes issued under this section.

   (6)   The authority may reimburse the Wisconsin Economic Development Corporation its operating costs to carry out its program responsibilities relating to economic development which are funded by bonds or notes issued under this section.

   (7)   The authority may, by resolution before issuance, declare any issue of its bonds or notes to be subject to federal income taxation.