Cal. Revenue and Taxation Code § 17255

(a) Section 179(b)(1) of the Internal Revenue Code, relating to dollar limitation, shall not apply and in lieu thereof, the aggregate cost which may be taken into account under Section 179(a) of the Internal Revenue Code for any taxable year shall not exceed twenty-five thousand dollars ($25,000). (b) Section 179(b)(2) of the Internal Revenue Code, relating to reduction in limitation, does not apply and in lieu thereof, the limitation under subdivision (a) for any taxable year shall be reduced, but not to below zero, by the amount by which the cost of Section 179 property, as defined in Section 179(d)(1) of the Internal Revenue Code, except as otherwise provided, placed in service during the taxable year exceeds two hundred thousand dollars ($200,000). (c) Section 179 of the Internal Revenue Code is modified to provide that the “aggregate amount disallowed” referred to in Section 179(b)(3)(B) of the Internal Revenue Code shall be computed under this part as it read on the date the property generating the amount disallowed was placed in service. (d) Section 179(c)(2) of the Internal Revenue Code, relating to elections, shall not apply. (e) Section 179(d)(1)(A)(ii) of the Internal Revenue Code does not apply. (f) Section 179(e) of the Internal Revenue Code, relating to special rules for qualified disaster assistance property, shall not apply. (g) The amendments made by Section 124 of the Consolidated Appropriations Act, 2016 (Public Law 114-113) to Section 179 of the Internal Revenue Code, relating to elections to expense certain depreciable business assets, shall not apply. (h) The amendments made by Section 13101 of the Tax Cuts and Jobs Act, 2017 (Public Law 115-97) to Section 179 of the Internal Revenue Code, relating to elections to expense certain depreciable business assets, shall not apply.