Chapter 3. Mechanics, Materialmen, and Contractors. Subchapter I. General. §§ 40-301.01 – 40-301.03 Subchapter II. Subcontractor’s Lien. §§ 40-303.01 – 40-303.20a Subchapter III. Wharves and Lots. §§ 40-305.01 – 40-305.01 Subchapter IV. Artisan’s Lien. §§ 40-307.01 – 40-307.03