Furthermore, the Treaty stipulates "that the above-named propriety be yielded to Great Britain "without any territorial jurisdiction", and without any open communication by land with the country round about" (although there is dispute over whether this disclaims territorial jurisdiction over Gibraltar, or over the "country round about") and that no overland trade between Gibraltar and Spain is to take place, except for emergency provisions in the case that Gibraltar is unable to be resupplied by sea. The British Government and the Government of Gibraltar have argued that the membership of both Gibraltar and Spain in the European Union (EU) — Gibraltar was included as a Special member state territory when the United Kingdom joined the EU in 1973; Spain joined the EU in 1986 – superseded such restrictions as the EU is committed to free movement of goods and services. The effect of Brexit on Gibraltar is unclear.