State laws control what is enforceable in a Prenuptial Agreement. If you need to know what restrictions your state may impose, you can ask a lawyer. Here are some agreements that your state may not support:
Parental rights. Prenuptial Agreements cannot protect or enforce parental rights. If you decide to divorce and have mutual children, you will need to go through mediation and or court to decide custody arrangements.
Maintenance waivers. In some cases, a prenup may not support the waiving of maintenance (alimony and palimony) payments. While that information can be included in the agreement, the court may review the maintenance at the time of divorce and change the amount if they feel the waiver is unfair.
Incentives for divorce. Judges may look for provisions in the agreement that appear to provide monetary incentives for divorce.
Non-financial agreements. Most judges do not want to see personal information such as who you are to spend holidays with in a Prenuptial Agreement. You can make those agreements in a separate document if needed.
Signing under duress. If the judge deems that either party appeared to sign under pressure, they may choose to not support the agreement and divide assets according to applicable state laws. For this reason, most lawyers suggest that the document is signed well in advance of the wedding.
Legal resources for a Prenuptial Agreement: Uniform Premarital and Marital Agreements Act