Vt. Stat. Ann. tit. 14, § 323

(1) At any time before or during a marriage, a spouse may waive the right to an elective share of a deceased spouse's estate, waive the right to a homestead or other allowance, and waive any other spousal rights or interest in property, in whole or in part, by a written instrument signed by the waiving spouse.

(2) A written waiver of spousal rights is presumed to be valid unless the party contesting the waiver demonstrates that: the waiver was not voluntary, or was made as a result of fraud, duress, or coercion;

(3) the waiver was unconscionable when signed or is unconscionable in its application due to a material change in circumstances that arose subsequent to the execution of the instrument through no fault or no action of the contesting party;

(4) before signing the waiver, the waiving spouse was not provided fair and reasonable disclosure of the property and financial obligations of the decedent; or

(5) before signing the waiver, the waiving spouse did not have an opportunity for meaningful access to independent counsel.

(6) A waiver under this section may be signed on behalf of a waiving spouse by a guardian or by an agent or an attorney-in-fact under a power of attorney that: expressly grants the authority to make the election; or

(7) grants the agent or attorney-in-fact the authority to act in the management and disposition of the principal's property that is as broad or comprehensive as the principal could exercise for himself or herself; and (2) (A) grants the agent or attorney-in-fact the authority to act in the management and disposition of the principal's property that is as broad or comprehensive as the principal could exercise for himself or herself; and

(8) does not expressly exclude the authority to make the election.