Ark. Code Ann. § 20-9-1311: Nonwaivable

(a) Unless part of a mutually agreed upon mediation or settlement, a provision in an agreement, policy, procedure, or contract, including bylaws, that purports to waive any provision of this subchapter is void.

(b) However, the time periods for compliance with procedural requirements may be waived by mutual consent of the parties on a case-by-case basis.