 These properties are outstanding examples of the world's natural or cultural heritage, and provide highly valuable environmental, tourism and economic services for Queensland.For each park, either a management statement or a management plan is prepared to identify the park's special values and determine ways to ensure those values are preserved, enhanced or maintained.The service employs park rangers who are responsible for constructing and maintaining infrastructure such as camping areas, picnic areas, amenities, walking tracks and lookouts providing advice to visitors, recording wildlife data, controlling feral plants and animals, assisting in the preparation of management plans and enforcing park rules.