The sovereignty of Canada is a major cultural matter in Canada. Several issues currently define Canadian sovereignty: the Canadian monarchy, telecommunication, the autonomy of provinces, and Canada's Arctic border. Under Canada's Telecommunications Act, telecommunication carriers must be nationally owned. The most recent issue affecting Canadian sovereignty has been caused by the melting of Arctic ice. As Arctic ice in Northern Canada has melted, several countries have struggled to come to an agreement on who owns certain areas in the oil-rich Arctic.