Tex. Spec. Dist. Code § 9601.205
(a) At the discretion of the board, bonds may be additionally secured by a deed of trust or mortgage lien on all or part of the district's physical property, facilities, easements, water rights and appropriation permits, leases, contracts, and all rights appurtenant to the property, vesting in the trustee power to:
(b) A purchaser under a sale under the deed of trust lien, if one is given, is:
Added by Acts 2009, 81st Leg., R.S., Ch. 523 (S.B. 1223), Sec. 1, eff. June 19, 2009.