Cal. Rev. & Tax. Code § 19714

Whenever it appears to the State Board of Equalization or any court of record of this state that proceedings before it under this part have been instituted or maintained by the taxpayer primarily for delay or that the taxpayer’s position in the proceedings is frivolous or groundless, or that the taxpayer unreasonably failed to pursue available administrative remedies, a penalty in an amount not in excess of five thousand dollars ($5,000) shall be imposed. Any penalty so imposed shall be paid upon notice and demand from the Franchise Tax Board and shall be collected as a tax.