Tex. Code Crim. Proc. art. 43.17

Upon the receipt of such condemned person by the Director of the Department of Corrections, the condemned person shall be confined therein until the time for his or her execution arrives, and while so confined, all persons outside of said prison shall be denied access to him or her, except his or her physician, lawyer, and clergyperson, who shall be admitted to see him or her when necessary for his or her health or for the transaction of business, and the relatives and friends of the condemned person, who shall be admitted to see and converse with him or her at all proper times, under such reasonable rules and regulations as may be made by the Board of Directors of the Department of Corrections.