The trustees of any trust which is a private foundation, as defined in Section 509 of the Internal Revenue Code, a charitable trust, as defined in Section 4947(a)(1) of the Internal Revenue Code, or a split-interest trust, as defined in Section 4947(a)(2) of the Internal Revenue Code, may, without judicial proceedings, amend the governing instrument of the trust expressly to exclude the application of Code Sections 53-12-124, 53-12-125, or both, by executing a written amendment to the trust and filing a duplicate original of the amendment with the Attorney General of this state, whereupon the Code section or Code sections, as the case may be, shall not apply to the trust.