Cal. Rev. & Tax. Code § 24357

(a) There shall be allowed as a deduction any charitable contribution, as defined in Section 24359, the payment of which is made within the taxable year. A charitable contribution shall be allowable as a deduction only if verified under regulations prescribed by the Franchise Tax Board.
(b)
1. (1) In the case of a corporation reporting its income on the accrual basis, the corporation may elect to treat the contribution as paid during that taxable year if both of the following occur:
  1. (A) The board of directors authorizes a charitable contribution during the taxable year.
  2. (B) Payment of the contribution is made after the close of that taxable year and on or before the 15th day of the fourth month following the close of the taxable year.
2. (2) The election allowed by paragraph (1) may be made only at the time of the filing of the return for the taxable year, and shall be signified in the manner as the Franchise Tax Board shall by regulations prescribe.
(c) For purposes of this section, payment of a charitable contribution that consists of a future interest in tangible personal property shall be treated as made only when all intervening interests in, and rights to the actual possession or enjoyment of, the property have expired or are held by persons other than the taxpayer or those standing in a relationship to the taxpayer described in Section 24428. For purposes of the preceding sentence, a fixture which is intended to be severed from the real property shall be treated as tangible personal property.
(d) No deduction shall be allowed under this section for traveling expenses (including amounts expended for meals and lodging) while away from home, whether paid directly or by reimbursement, unless there is no significant element of personal pleasure, recreation, or vacation in that travel.
(e)
1. (1) Section 170(f)(8) of the Internal Revenue Code, relating to substantiation requirement for certain contributions, shall apply, except as otherwise provided.
2. (2) No deduction shall be denied under Section 170(f)(8) of the Internal Revenue Code, relating to substantiation requirement for certain contributions, upon a showing that the requirements in Section 170(f)(8) of the Internal Revenue Code have been met with respect to that contribution for federal purposes.
(f) Section 170(f)(9) of the Internal Revenue Code, relating to denial of deduction where contribution for lobbying activities, shall apply, except as otherwise provided.
(g)
1. (1) Notwithstanding any other provision of law to the contrary, for purposes of this section and Section 24341, Section 170 of the Internal Revenue Code, relating to charitable, etc., contributions and gifts, shall be applied to allow a taxpayer to elect to treat any contribution described in paragraph (2) made in January 2005, as if that contribution was made on December 31, 2004, and not in January 2005.
2. (2) A contribution is described in this paragraph if that contribution is a cash contribution made for the relief of victims in areas affected by the December 26, 2004, Indian Ocean tsunami for which a charitable contribution deduction is allowable under this section.
(h)
1. (1) Section 170(f)(11)(E) of the Internal Revenue Code, relating to qualified appraisal and appraiser, shall apply, except as otherwise provided.
2. (2) This subdivision shall apply to appraisals prepared with respect to returns or submissions filed on or after January 1, 2010.
(i)
1. (1) Section 170(f)(16) of the Internal Revenue Code, relating to contributions of clothing and household items, shall apply, except as otherwise provided.
2. (2) This subdivision shall apply to contributions made on or after January 1, 2010.
(j)
1. (1) Section 170(f)(17) of the Internal Revenue Code, relating to recordkeeping, shall apply, except as otherwise provided.
2. (2) This subdivision shall apply to contributions made on or after January 1, 2010.
(k)
1. (1) Section 170(o) of the Internal Revenue Code, relating to special rules for fractional gifts, shall apply, except as otherwise provided.
2. (2) This subdivision shall apply to contributions made on or after January 1, 2010.
(l)
1. (1)
  1. (A) The amendments made by Section 605(a)(1) of Public Law 117-328 adding paragraph (7) to Section 170(h) of the Internal Revenue Code, relating to limitation on deduction for qualified conservation contributions made by passthrough entities, shall apply, except as otherwise provided.
  2. (B) Section 170(h)(7)(G) of the Internal Revenue Code, relating to regulations, as added by Section 605(a)(1) of Public Law 117-328, shall not apply.
  3. (C) Section 605(a)(3) of Public Law 117-328, relating to extension of statute of limitations for listed transactions, shall apply and is modified by substituting “Section 19755” for “sections 6501(c)(10) and 6235(c)(6) of such Code.”
2. (2) The amendments made by Section 605(b) of Public Law 117-328 adding paragraph (19) to Section 170(f) of the Internal Revenue Code, relating to certain qualified conservation contributions, shall apply.
3. (3) This subdivision shall apply to contributions made on or after January 1, 2024.
(m) Section 605(d)(2) of Public Law 117-328, relating to opportunity to correct, shall apply.