Rev. & Tax. Code, § 18031.5

(a) The amendments made by Section 13303(a) and (b) of the Tax Cuts and Jobs Act, 2017 (Public Law 115-97) to Section 1031 of the Internal Revenue Code, relating to exchange of real property held for productive use or investment, shall apply, except as otherwise provided in this section.

(b) (1) (A) In the case of a taxpayer who is a head of household, a surviving spouse, or spouses filing a joint return, this section shall only apply to those taxpayers with adjusted gross income, as defined in Section 17072, of five hundred thousand dollars ($500,000) or more for the taxable year in which the exchange begins.

(B) In the case of a taxpayer filing an individual return, this section shall only apply to those taxpayers with adjusted gross income, as defined in Section 17072, of two hundred fifty thousand dollars ($250,000) or more for the taxable year in which the exchange begins.

(2) This subdivision shall not apply for taxable years beginning on or after January 1, 2025.

(c) (1) This section shall apply to exchanges completed after January 10, 2019.

(2) This section shall not apply to an exchange where the property to be disposed of by the taxpayer in the exchange is disposed of by that taxpayer on or before January 10, 2019, or where the property to be received by the taxpayer in the exchange is received by that taxpayer on or before January 10, 2019.