Cal. Rev. & Tax. Code § 6368.9

(a) There are exempted from the taxes imposed by this part, the gross receipts from the sale in this state of, and the storage, use, or other consumption in this state of, qualified equipment purchased by a qualified person at the end of the term of a lease or sublease of qualified equipment pursuant to any exercise of a purchase option under the lease or sublease, provided the following conditions are satisfied:
1. (1) As of the date the lease or sublease was entered into, the qualified person and qualified equipment were otherwise eligible for exemption under Section 6368.8, as that section read on that same date.
2. (2) The lease or sublease was entered into before the repeal date of Section 6368.8.
(b) For purposes of this section, “qualified equipment” and “qualified person” have the same meanings as defined in Section 6368.8, as that section read on the date the lease or sublease was entered into.
(c) This section shall only become operative if Section 6368.8 is repealed and, in that event, shall become operative on the date that section is repealed.