Kim and Kanye are in love and recently agreed to marry in community of property. Kim in recent days has become unhappy with Kanye's spending. Kim is aware that both husband and wife have full and equal contractual capacity individually to enter into contracts concerning the joint estate. However, the law regards certain contracts as being too important for a spouse (husband or wife) to enter into alone.

Advise Kim on when is the consent of the other spouse required for a contract to be valid. What does limited contractual capacity mean and how can she ensure that mutual assets are not sold?