Cal. Rev. & Tax. Code § 17755

Section 664(c) of the Internal Revenue Code, relating to the taxation of trusts, shall not apply and, in lieu thereof, a charitable remainder annuity trust and a charitable remainder unitrust shall, for any taxable year, not be subject to any tax imposed under this part, unless that trust, for the taxable year, has unrelated business taxable income, within the meaning of Section 23732, determined as if Chapter 4 (commencing with Section 23701) of Part 11, applied to that trust.