Texas Health and Safety Code - HEALTH & SAFETY § 779.006. Liability Exemption

(a) Unless the conduct is wilfully or wantonly negligent, a physician who prescribes or is otherwise involved in the acquisition of an automated external defibrillator and any person or entity that provides training in the use of an automated external defibrillator are not liable for civil damages related to:

(b) Any person or entity that acquires an automated external defibrillator and any person or entity that owns, occupies, manages, or is otherwise responsible for the designated location where the automated external defibrillator is placed are not liable for civil damages related to the use or attempted use of or the failure to use the automated external defibrillator unless the conduct is wilfully or wantonly negligent.

(c) The immunity provided by this section is in addition to any other immunity or limitations of liability provided by other law.

(d) The immunity described by this section applies regardless of whether the person who uses, attempts to use, or fails to use the automated external defibrillator received training in the use of an automated external defibrillator.