California Code, Revenue and Taxation Code - RTC § 24436.1

(a) In computing net income, deductions, including deductions for cost of goods sold, shall not be allowed to any taxpayer from any of its gross income directly derived from any act or omission of criminal profiteering activity, as defined in Section 186.2 of the Penal Code, or as defined in Chapter 6 (commencing with Section 11350) of Division 10 of the Health and Safety Code, or Article 5 (commencing with Section 750) of Chapter 1 of Part 2 of Division 1 of the Insurance Code; and deductions shall not be allowed to any taxpayer on any of its gross income derived from any other activities which directly tend to promote or to further, or are directly connected or associated with, those acts or omissions.

(b) A prior, final determination by a court of competent jurisdiction of this state in any criminal proceedings or any proceeding in which the state, county, city and county, city, or other political subdivision was a party thereto on the merits of the legality of the activities of a taxpayer, or predecessor in interest of a taxpayer, shall be required in order for subdivision (a) to apply and shall be binding upon the Franchise Tax Board and the State Board of Equalization.