(a) Nothing in this chapter shall be construed as authorizing the authority, and the authority is not authorized, to mortgage or otherwise encumber any of its property of any kind, real, personal, or mixed, or any interest in such property, or to acquire any property or interest subject to a mortgage or conditional sale, provided that this section may not be construed as preventing the pledging of the revenues of the authority as authorized by this chapter.
(b) Nothing in this chapter shall be construed as authorizing the sale of any property or interest by the authority or by any receiver of any of its properties or through any court proceeding or otherwise, unless, by the affirmative vote of three-fourths of its statutory membership, the board has determined that the property or interest is not necessary or convenient or of beneficial use to the business of the authority and has approved the terms of the sale. Except by sale as expressly authorized in this section, authority property or interest may not come into the ownership or control, directly or indirectly, of any person, firm, or corporation other than a public authority created under the laws of this state or a nonprofit corporation created by the authority under Chapter 152, Water Code.

(c) The limitations on the sale of property of the authority in this section do not and are not intended to preclude the authority from selling any interest owned or held by the authority in any jointly owned electric power and generating facilities constructed, or to be constructed, under Section 8503.004(t), provided that the sale of an ownership interest in a joint project is provided for and in conformance with any contract with other owners regarding the electric power and energy generating facilities.
(d) All authority property is exempt from forced sale, and nothing in this chapter shall be construed to authorize the sale of any of the property of the authority under a judgment rendered in a suit, and a sale of that kind is prohibited.