Hash-style runs are usually, but not exclusively, held on public land, footpaths, or roads. No guarantee can be made that this is always the case if, for instance, public footpaths are not clearly marked, either in situ or on maps; the ownership of the land is uncertain; or for any other reason. Each runner is free to decide whether or not to follow the marked course. It is the responsibility of each participant to ensure his or her own safety and the safety of others, including non-participants, livestock and wildlife. Dogs are the responsibility of their owners/keepers. Children under sixteen years must be accompanied by, and are the responsibility of, their parents or carers. Each "hash" covers a different location and route, and is run without marshals or other officials. "Hash House Harriers" defines a style of social jogging and is not a legal entity.