Which of the following is not an example of a public trust doctrine?

The public trust doctrine is a legal principle that holds that certain natural resources are held in trust by the government for the benefit of the public. Examples of public trust doctrines include the government's authority to regulate navigation and commerce on navigable waters, the government's responsibility to protect and preserve public lands, and the government's authority to regulate fishing and hunting in public waters. The government's authority to regulate private property use is not an example of a public trust doctrine.