D.C. Code § 46-506: Enforcement.

(a)

A premarital agreement is not enforceable if the party against whom enforcement is sought proves that:

(1)

That party did not execute the agreement voluntarily; or

(2)

The agreement was unconscionable when it was executed and, before execution of the agreement, that party:

(A)

Was not provided a fair and reasonable disclosure of the property or financial obligations of the other party;

(B)

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

(C)

Did not have, or reasonably could not have had, an adequate knowledge of the property or financial obligations of the other party.

(b)

If a provision of a premarital agreement modifies or eliminates spousal or domestic partner 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, marital dissolution, or termination of a domestic partnership pursuant to § 32-702(d), a court, notwithstanding the terms of the agreement, may require the other party to provide support to the extent necessary to avoid that eligibility.

(c)

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