Texas Property Code - PROP § 53.231. Lien

(a) A person who furnishes material or labor to a contractor under a prime contract with a governmental entity other than a municipality or a joint board created under Subchapter D, Chapter 22, Transportation Code, that does not exceed $25,000 and that is for public improvements in this state and who gives notice required by this subchapter has a lien on the money, bonds, or warrants due the contractor for the improvements.

(b) A person who furnishes material or labor to a contractor under a prime contract with a municipality or a joint board created under Subchapter D, Chapter 22, Transportation Code, that does not exceed $50,000 and that is for public improvements in this state and who gives notice required by this subchapter has a lien on the money, bonds, or warrants due the contractor for the improvements.