Section 3356 Of Article 2. Employees From California Labor Code >> Division 4. >> Part 1. >> Chapter 2. >> Article 2.

. As used in subdivision (d) of Section 3351 and in Section 3355, the term "trade, business, profession, or occupation" includes any undertaking actually engaged in by the employer with some degree of regularity, irrespective of the trade name, articles of incorporation, or principal business of the employer.