(1) A premarital agreement is not enforceable if the party against whom enforcement is sought proves that:
(a)  That party did not execute the agreement voluntarily; or
(b)  The agreement was unconscionable when it was executed and, before execution of the agreement, that party:
(i)   Was not provided a fair and reasonable disclosure of the property or financial obligations of the other party;
(ii)  Did not voluntarily and expressly waive, in writing, any right to disclosure of the property or financial obligations of the other party beyond the disclosure provided; and
(iii) Did not have, or reasonably could not have had, an adequate knowledge of the property or financial obligations of the other party.
(2)  If a provision of a premarital agreement modifies or eliminates spousal support and that modification or elimination causes one party to the agreement to be eligible for support under a program of public assistance at the time of separation or marital dissolution, a court, notwithstanding the terms of the agreement, may require the other party to provide support to the extent necessary to avoid that eligibility.

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Terms Used In Idaho Code 32-925

(3)  An issue of unconscionability of a premarital agreement shall be decided by the court as a matter of law.