Tex. Bus. & Com. Code § 108.002
A commercial lodging establishment or restaurant may not require the payment of an extra fee or charge or a security deposit for a service canine that accompanies an individual to the establishment or restaurant if:
(1) the individual is:
(2) the individual is away from the individual's home jurisdiction while in the course and scope of duty because of:
Added by Acts 2011, 82nd Leg., R.S., Ch. 579 (H.B. 3487), Sec. 1, eff. September 1, 2011.