The main purpose of this legislation is to prevent members of the Chinese Communist Party and entities associated with them from buying real estate in the United States. The goal is to protect American land and property from foreign influence, particularly from a government that is viewed as adversarial. The key provision of this law mandates that the President must take necessary actions to prohibit these purchases. This applies to both public and private real estate across the entire United States, which includes all states, territories, and possessions.