Cal. Rev. & Tax. Code § 19142

# (a)

Except as provided in Sections 19147 and 19148 and subdivision (b), in the case of any underpayment of tax imposed under Part 11 (commencing with Section 23001) there shall be added to the tax for the taxable year an amount determined at the rate established under Section 19521 on the amount of the underpayment for the period of the underpayment.

# (b)

(1)No addition to tax shall be imposed under this section to the extent that the underpayment was created or increased by any provision of law that is chaptered during and operative for the taxable year of the underpayment.

(2)Notwithstanding Section 18415, this subdivision applies to penalties imposed on and after January 1, 2005.