The "Protecting our Land Act" seeks to prohibit the purchase of public or private real estate located in the United States by foreign adversaries and state sponsors of terrorism. The bill mandates that the President direct federal departments and agencies to promulgate rules and regulations to enforce this ban. This prohibition extends not only to foreign adversaries and state sponsors of terrorism themselves but also to their agents, instrumentalities, or any person owned, controlled, or affiliated with them. A foreign adversary is defined as any foreign government or person whose conduct is significantly adverse to U.S. national security or the safety of U.S. persons. A state sponsor of terrorism refers to a country whose government the Secretary of State determines has repeatedly supported international terrorism. The legislation aims to safeguard U.S. land from acquisition by entities deemed hostile to national interests.