Cal. Business and Professions Code § 7532

(a) No licensee shall conduct a business under a fictitious or other business name unless and until the licensee has obtained the written authorization of the bureau to do so. (b) The bureau shall not authorize the use of a fictitious or other business name which is so similar to that of a public officer or agency or of that used by another licensee that the public may be confused or misled thereby. (c) The authorization shall require, as a condition precedent to the use of any fictitious name, that the licensee comply with Chapter 5 (commencing with Section 17900) of Part 3 of Division 7. (d) A licensee desiring to conduct their business under more than one fictitious business name shall obtain the authorization of the bureau in the manner prescribed in this section for the use of each name. (e) The licensee shall pay a fee of at least seventy-five dollars ($75), which may be increased to not more than eighty-two dollars ($82), for each authorization to use an additional fictitious business name and for each change in the use of a fictitious business name. If the original license is issued in a nonfictitious name and authorization is requested to have the license reissued in a fictitious business name, the licensee shall pay a fee of at least seventy-five dollars ($75), which may be increased to not more than eighty-two dollars ($82), for the authorization.