The Freeport Doctrine might be defined as the concept that:

The Freeport Doctrine is a legal concept that holds that individuals can own property and that the government cannot enact laws or regulations that unreasonably interfere with their ability to use or transfer that property. The Doctrine recognizes that the government should not have unfettered power to control a person's freedom of expression on their property, but should have a limited role in ensuring that individuals can use their rights to their own property without fear of government interference. This Doctrine has become increasingly important as cities and local governments seek to impose zoning and other restrictions on what individuals can do on their private property.