(b) (1) By September 1 of the second calendar year and each subsequent calendar year that the California Cancer Research Voluntary Tax Contribution Fund appears on the tax return, the Franchise Tax Board shall determine whether the amount of contributions estimated to be received during the calendar year will equal or exceed the minimum contribution amount for the calendar year pursuant to paragraph (3). The Franchise Tax Board shall estimate the amount of contributions to be received by using the actual amounts received and an estimate of the contributions that will be received by the end of that calendar year.

(2) If the Franchise Tax Board determines that the amount of the contributions estimated to be received during a calendar year will not at least equal the minimum contribution amount for the calendar year, this article is inoperative with respect to taxable years beginning on or after January 1 of that calendar year and is repealed on December 1 of that calendar year.

(3) For purposes of this section, the minimum contribution amount for a calendar year means two hundred fifty thousand dollars ($250,000).