Cal. Rev. & Tax. Code § 18764
There is in the State Treasury the California Alzheimer's Disease and Related Dementia Research Voluntary Tax Contribution Fund to receive contributions made pursuant to Section 18763. The Franchise Tax Board shall notify the Controller of both the amount of money paid by individuals in excess of their tax liability and the amount of refund money that individuals have designated pursuant to Section 18763 to be transferred to the California Alzheimer's Disease and Related Dementia Research Voluntary Tax Contribution Fund. The Controller shall transfer from the Personal Income Tax Fund to the California Alzheimer's Disease and Related Dementia Research Voluntary Tax Contribution Fund an amount not in excess of the sum of the amounts designated by individuals pursuant to Section 18763 for payment into that fund.
Ca. Rev. and Tax. Code § 18764