Cal. Rev. & Tax. Code § 5909
(b) Where a taxpayer’s failure to timely report information or pay amounts of tax directly results from the taxpayer’s reasonable reliance on the county assessor’s written ruling under subdivision (a), the taxpayer shall be relieved of any penalties, or interest assessed or accrued, with respect to property taxes not timely paid as a direct result of the taxpayer’s reasonable reliance. A taxpayer’s failure to timely report property values or to make a timely payment of property taxes shall be considered to directly result from the taxpayer’s reasonable reliance on a written ruling from the assessor under subdivision (a) only if all of the following conditions are met: