(a) Except as provided under (b) of this section, a written waiver of lien or stop-lending notice of rights created under AS 34.35.050 - 34.35.120 signed by a claimant requires no consideration and is valid and binding. A waiver permitted under this section may not relate to labor, materials, services, or equipment furnished after the date the waiver is signed by the claimant.
(b) An individual described in AS 34.35.120(10) may not waive right to claim a lien under AS 34.35.050 - 34.35.120. A waiver that purports to waive the lien rights of that individual or class of individuals is void.