A property owner wants to use water from a river that runs through the property to irrigate a potato field. To do so, the owner is required by state law to submit an application to the Department of Water Resources describing in detail the plan for beneficial use of the water. If the department approves the owner's application, it will issue a permit allowing a limited amount of river water to be diverted onto the property. Based on these facts, it can be assumed that this property owner's state relies on which rule of law?