California Codes, Business and Professions Code - BPC, Division 3 — Professions and Vocations Generally, Chapter 9 — Contractors, Article 3 — Exemptions, Section 7049

This chapter does not apply to any construction or operation incidental to the construction and repair of irrigation and drainage ditches of regularly constituted irrigation districts, reclamation districts, or to farming, dairying, agriculture, viticulture, horticulture, or stock or poultry raising, or clearing or other work upon the land in rural districts for fire prevention purposes, except when performed by a licensee under this chapter.

The provisions of this chapter do apply to the business of drilling digging, boring, or otherwise constructing, deepening, repairing, reperforating, or abandoning water wells.