Tex. Prop. Code § 53.286
"CONDITIONAL WAIVER AND RELEASE ON PROGRESS PAYMENT
"NOTICE:
"UNCONDITIONAL WAIVER AND RELEASE ON PROGRESS PAYMENT
"CONDITIONAL WAIVER AND RELEASE ON FINAL PAYMENT
"NOTICE:
"UNCONDITIONAL WAIVER AND RELEASE ON FINAL PAYMENT
Notwithstanding any other law and except as provided by Section 53.282, any contract, agreement, or understanding purporting to waive the right to file or enforce any lien or claim created under this chapter is void as against public policy.
Added by Acts 2011, 82nd Leg., R.S., Ch. 271 (H.B. 1456), Sec. 3, eff. January 1, 2012.