California Code, Revenue and Taxation Code - RTC § 24678

(a) If an amount representing damages is received or accrued during a taxable year as a result of an award in, or settlement of, a civil action brought under Section 4 of the act entitled “An act to supplement existing laws against unlawful restraints and monopolies, and for other purposes,” approved October 15, 1914 (commonly known as the Clayton Act), for injuries sustained by a corporation in its business or property by reason of anything forbidden in the antitrust laws, then the tax attributable to the inclusion of that amount in gross income for the taxable year shall not be greater than the aggregate of the increases in taxes which would have resulted if that amount had been included in gross income in equal installments for each month during the period in which the injuries were sustained by the corporation.

(b) This section shall apply to taxable years ending after June 23, 1961, but only with respect to amounts received or accrued after that date as a result of awards or settlements made after that date.