What is a key component of Dillon's Rule?

The key component of Dillon's Rule is the concept of expressly granted powers. Dillon's Rule, formulated by Judge John F. Dillon in the 19th century, stipulates that local governments have only those powers that are explicitly granted to them by the state government. This means that any action or authority assumed by a local government must be clearly defined within the limits set forth by state legislation or constitutions.

This principle contrasts with the concept of home rule, where local governments might have broader powers, including those that are implied or necessarily derived from their existence. Under Dillon's Rule, local entities cannot assume powers not specifically delineated by state law, emphasizing a more restrictive interpretation of local authority. This framework is essential in understanding the relationship between state and local governments and the limits imposed on local policy-making.