since the victorian era, authorities on tartan have claimed that there is an etiquette to wearing tartan, specifically tartan attributed to clans or families. even so, there are no laws or rules on who can, or cannot, wear a particular tartan. the concept of the entitlement to certain tartans has led to the term of "universal tartan", or "free tartan", which describes tartan which can be worn by anyone. traditional examples of such are "black watch", "caledonian", "hunting stewart", and "jacobite" tartans, and many district or regional tartans.