(1) The rights of a surviving spouse to an elective share, intestate share, pretermitted share, homestead, exempt property, family allowance, and preference in appointment as personal representative of an intestate estate or any of those rights, may be waived, wholly or partly, before or after marriage, by a written contract, agreement, or waiver, signed by the waiving party in the presence of two subscribing witnesses. The requirement of witnesses shall be applicable only to contracts, agreements, or waivers signed by Florida residents after the effective date of this law. Any contract, agreement, or waiver executed by a nonresident of Florida, either before or after this law takes effect, is valid in this state if valid when executed under the laws of the state or country where it was executed, whether or not he or she is a Florida resident at the time of death. Unless the waiver provides to the contrary, a waiver of “all rights,” or equivalent language, in the property or estate of a present or prospective spouse, or a complete property settlement entered into after, or in anticipation of, separation, dissolution of marriage, or divorce, is a waiver of all rights to elective share, intestate share, pretermitted share, homestead, exempt property, family allowance, and preference in appointment as personal representative of an intestate estate, by the waiving party in the property of the other and a renunciation by the waiving party of all benefits that would otherwise pass to the waiving party from the other by intestate succession or by the provisions of any will executed before the written contract, agreement, or waiver.
(2) Each spouse shall make a fair disclosure to the other of that spouse’s estate if the agreement, contract, or waiver is executed after marriage. No disclosure shall be required for an agreement, contract, or waiver executed before marriage.
(3) No consideration other than the execution of the agreement, contract, or waiver shall be necessary to its validity, whether executed before or after marriage.