Final answer:
Lead paint disclosure forms should be kept for a certain period of time as required by law, which varies by state.
Step-by-step explanation:
Lead paint disclosure forms should be kept for a certain period of time as required by law. In the United States, there is no federal law that specifies the exact duration for keeping these forms. However, individual states may have their own regulations and statutes regarding lead paint disclosure forms. For example, in California, sellers and landlords are required to keep the forms for at least three years.