Texas Property Code - PROP § 54.022. Commercial Building

(a) The lien is unenforceable for rent on a commercial building that is more than six months past due unless the landlord files a lien statement with the county clerk of the county in which the building is located.

(b) The lien statement must be verified by the landlord or the landlord's agent or attorney and must contain:

(c) Each county clerk shall index alphabetically and record the rental lien statements filed in the clerk's office.