Cal. Rev. & Tax. Code § 6457

Section 6453 shall not be applicable with respect to a lease of tangible personal property, but the lessor shall report the rentals paid by the lessee during the preceding reporting period; a lessee shall report the rentals payable in the preceding reporting period upon which tax has not been paid to his lessor required to collect the tax. The return shall also show the amount of the taxes for the period covered by the return and such other information as the board deems necessary for the proper administration of this part.