Cal. Prob. Code § 18506

(a) If the donor consents in a record, an institution may release or modify, in whole or in part, a restriction contained in a gift instrument on the management, investment, or purpose of an institutional fund. A release or modification may not allow a fund to be used for a purpose other than a charitable purpose of the institution.
(b) The court, upon application of an institution, may modify a restriction contained in a gift instrument regarding the management or investment of an institutional fund if the restriction has become impracticable or wasteful, if it impairs the management or investment of the fund, or if, because of circumstances not anticipated by the donor, a modification of a restriction will further the purposes of the fund. The institution shall notify the Attorney General of the application, and the Attorney General must be given an opportunity to be heard. To the extent practicable, any modification must be made in accordance with the donor’s probable intention.
(c) If a particular charitable purpose or a restriction contained in a gift instrument on the use of an institutional fund becomes unlawful, impracticable, impossible to achieve, or wasteful, the court, upon application of an institution, may modify the purpose of the fund or the restriction on the use of the fund in a manner consistent with the charitable purposes expressed in the gift instrument. The institution shall notify the Attorney General of the application, and the Attorney General must be given an opportunity to be heard.
(d) If an institution determines that a restriction contained in a gift instrument on the management, investment, or purpose of an institutional fund is unlawful, impracticable, impossible to achieve, or wasteful, the institution, 60 days after notification to the Attorney General and to the donor at the donor’s last known address in the records of the institution, may release or modify the restriction, in whole or part, if all of the following apply:
1. (1) The institutional fund subject to the restriction has a total value of less than one hundred thousand dollars ($100,000).
2. (2) More than 20 years have elapsed since the fund was established.
3. (3) The institution uses the property in a manner consistent with the charitable purposes expressed in the gift instrument. An institution that releases or modifies a restriction under this subdivision may, if appropriate circumstances arise thereafter, use the property in accordance with the restriction notwithstanding its release or modification, and that use is deemed to satisfy the consistency requirement of this paragraph.