Waiver of statutory rights may be valid unless it affects public rights or public policy; it can be by conduct. The principle of waiver allows a person to renounce benefits conferred for their protection provided the waiver does not affect public rights or public policy. A statutory right may be waived by express agreement or by conduct; the party asserting waiver must prove the agreement or conduct. Legislatures may impose statutory conditions that are non-waivable or declare waiver agreements void, and contractual arrangements ordinarily can relinquish statutory benefits unless prohibited by statutory terms or public policy.