Unlike all other contract laws, no consideration is necessary, although a minority of courts denounce marriage itself in return. Through a prenup, a spouse can completely waive property rights, support or inheritance, as well as the voting share, and can get nothing for it. The choice of legal provisions is crucial in the prenups. Contracting parties may decide that the law of the state in which they are married governs both the interpretation of the agreement and the division of property at the time of divorce. In the absence of a legal choice clause, it is the law of the place where the parties divorce, not the law of the state in which they were married, that decides matters of ownership and support. A “judicial election” clause allows the parties to choose the forum for which the courts are competent to interpret and implement the agreement. This can be very helpful because the parties know in advance which court should deal with their case. It also improves the choice of the clause of law, since the elected court will generally be located in the jurisdiction that applies the chosen law. In a 1990 California case, the Court of Appeal imposed an oral marriage in the estate of one of the parties because the surviving spouse had significantly changed his position according to the verbal agreement.  However, as a result of amendments to the act, it has become much more difficult to change the character of community or distinct property without written agreement.  In California, a couple may waive their ownership rights (common ownership) through a prior contract.
 The agreement may limit sp assistance (although a court may set it aside in the event of a divorce if it considers the restriction to be unacceptable). The agreement can be used as a contract to make a will that requires one spouse to take care of the other in the event of death. It may also restrict inheritance law in the event of death, such as the right to inheritance allowance, the right to execution, the right to take as a predetermined heir, etc.  In California, registered national partners may also enter into a prenup. Post-marriage agreements are treated very differently in California law. Spouses have a fiduciary duty to each other, so pre-marital agreements fall into a particular category of agreements.