Cal. Rev. & Tax. Code § 19717
(b)
(c) For purposes of this section:
(1) “Reasonable litigation costs” includes any of the following:
(B) Based upon prevailing market rates for the kind or quality of services furnished, any of the following:
(2)
(A) “Prevailing party” means any party to any proceeding described in subdivision (a) (other than the State of California or any creditor of the taxpayer involved) that meets either of the following criteria:
(B)
(iii) For purposes of clause (ii), the term “applicable published guidance” means either of the following:
(C) Any determination under this paragraph as to whether a party is a prevailing party shall be made by either of the following:
(f) For purposes of this section, “position of the State of California” includes either of the following: