SDCL § 44-9A-1: Liens subject to waiver under chapter.

Liens for materials, supplies, equipment, and services furnished under construction contracts to contractors or subcontractors and arising under Title 5 or Title 44 of the South Dakota Codified Laws or by virtue of the common law of this state may be expressly waived as provided in this chapter in addition to all other means presently existing under law by which such liens may be waived.