River management plans are varied and complex, strategically developed for the circumstances of individual rivers. A river management plan may involve a single agency regulating a river or a more comprehensive effort, with varied organizations, from grassroots to federal, working together to ensure river protection and appropriate uses. Enforcement varies from laws to cooperative arrangements. Ultimately, however, by designating river uses, river management is managing those who use a river. River management manages people, and this is what complicates the issue.