Tax Code §6.051

(a) The board of directors of an appraisal district may purchase or lease real property and may construct improvements as necessary to establish and operate the appraisal office or a branch appraisal office. (b) The acquisition or conveyance of real property or the construction or renovation of a building or other improvement by an appraisal district must be approved by the governing bodies of three-fourths of the taxing units entitled to vote on the appointment of board members. The board of directors by resolution may propose a property transaction or other action for which this subsection requires approval of the taxing units. The chief appraiser shall notify the presiding officer of each governing body entitled to vote on the approval of the proposal by delivering a copy of the board's resolution, together with information showing the costs of other available alternatives to the proposal. On or before the 30th day after the date the presiding officer receives notice of the proposal, the governing body of a taxing unit by resolution may approve or disapprove the proposal. If a governing body fails to act on or before that 30th day or fails to file its resolution with the chief appraiser on or before the 10th day after that 30th day, the proposal is treated as if it were disapproved by the governing body. (c) The board of directors may convey real property owned by the district, and the proceeds shall be credited to each taxing unit that participates in the district in proportion to the unit's allocation of the appraisal district budget in the year in which the transaction occurs. A conveyance must be approved as provided by Subsection (b) of this section, and any proceeds shall be apportioned by an amendment to the annual budget made as provided by Subsection (c) of Section 6.06 of this code. (d) An acquisition of real property by an appraisal district before January 1, 1988, may be validated before March 1, 1988, in the manner provided by Subsection (b) of this section for the acquisition of real property.