Texas Transportation Code - TRANSP § 313.051. No Lien on Exempt Property;  Liability of Owner

(a) This chapter does not authorize a lien against an interest in property that, at the time an improvement is ordered, is exempt from any lien created by an assessment for a street improvement.

(b) Notwithstanding Subsection (a), the owner of exempt property is personally liable for an assessment in connection with the property.

(c) The omission of an improvement fronting exempt property does not invalidate the lien or liability for an assessment made against nonexempt property.