Tex. Transportation Code § 314.054: VALIDITY OF ASSESSMENT.

An assessment or reassessment is valid and binding without regard to:

(1) an error, omission, or invalidity in a proceeding of the municipality under this chapter with reference to:

(A) the making of an improvement provided by this chapter;

(B) the taking or condemnation of property for an improvement; or

(C) the determination and payment of damages for property taken or damaged; or

(2) whether as of the date of the assessments the improvement was completed.

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.