erch Strait;
difficulties with Moldova's Transnistria region complicate
controlling border crossing and customs regimes despite concordance
on the 2003 delimitation and customs protocols and OSCE assistance;
has not resolved Romanian claims to Ukrainian-administered Zmiyinyy
(Snake) Island and Black Sea maritime boundary despite ongoing talks
based on 1997 friendship treaty to find a solution in two years;
ongoing dispute between Ukraine and Romania over the Danube River
delta

United Arab Emirates
because the treaties have not been made public,
the exact alignment of the boundary with Saudi Arabia is still
unknown and labeled approximate; boundary agreement signed and
ratified with Oman in 2003 for entire border, including Oman's
Musandam Peninsula and Al Madhah enclaves; UAE engage in direct
talks and solicit Arab League support to resolve disputes over
Iran's occupation of Lesser and Greater Tunb Islands and Abu Musa
Island

United Kingdom
since Gibraltar residents voted overwhelmingly by
referendum in 2003 against a "total shared sovereignty" arrangement,
talks between the UK and Spain over the fate of the 300-year old UK
colony have stalled; Spain disapproves of UK plans to grant
Gibraltar greater autonomy; Mauritius and Seychelles claim the
Chagos Archipelago (British Indian Ocean Territory), and its former
inhabitants since their eviction in 1965; most reside chiefly in
Mauritius, and in 2001 were granted UK citizenship and the right to
repatriation; UK continues to reject sovereignty talks requested by
Argentina, which still claims the Falkland Islands (Islas Malvinas)
and South Georgia and the South Sandwich Islands; Rockall
continental shelf dispute involving Denmark and Iceland remains
dormant; territorial claim in Antarctica (British Antarctic
Territory) overlaps Argentine claim and partially overlaps Chilean
claim; disputes with Iceland, Denmark, and Ireland over the Faroe
Islands continental shelf boundary outside 200 nm

United States
Prolonged drought, population growth, and outmoded
practices and infrastructure in the border region has strained
water-sharing arrangements with Mexico; undocumented nationals from
Mexico and Central America continue to enter the United States
illegally; 1990 Maritime Boundary Agreement in the Bering Sea still
awaits Russian Duma ratification; managed maritime boundary disputes
with Canada