Cal. Rev. & Tax. Code § 4151
Any person filing an affidavit of interest may apply to the tax collector to have any parcel separately valued in order that it may be redeemed under the provisions of this chapter. The tax collector may file an application to have any parcel separately valued when such application is based on the fact that the parcel sought to be separately valued is separately assessed on the current roll.
The application shall set forth the fact that a duly executed and recorded deed, purchase contract, deed of trust, mortgage, or final decree of court describes the parcel sought to be separately valued.
The application may request that the tax created by the assessment of personal property, or leasehold improvements, or possessory interests on the whole assessment for each of the years for which it was delinquent be allowed to remain as a lien on the parcel sought to be separately valued.
If any lien not determined by the application of a tax rate on a valuation of property has been levied or placed on the whole assessment, the application may be accompanied by the certification of the taxing agency or revenue district authorized by law to levy or place the lien, setting forth the specific amount of that portion of the lien levied or placed on the whole assessment which is to continue to be levied or placed on the parcel sought to be separately valued for each of the years for which it was delinquent.
Upon authorization by ordinance by the board of supervisors, the tax collector may charge an application fee for the actual cost incurred for the processing of an application for the separate valuation of any parcel for redemption under the provisions of this chapter. The fee shall be governed by the provisions of Chapter 12.5 (commencing with Section 54985) of Part 1 of Division 2 of Title 5 of the Government Code.
Ca. Rev. and Tax. Code § 4151