the parallels of latitude to equidistance lines
which favor Peru; organized illegal narcotics operations in Colombia
have penetrated Peru's shared border; Peru rejects Bolivia's claim
to restore maritime access through a sovereign corridor through
Chile along the Peruvian border

Philippines
Philippines claims sovereignty over certain of the
Spratly Islands, known locally as the Kalayaan (Freedom) Islands,
also claimed by China, Malaysia, Taiwan, and Vietnam; the 2002
"Declaration on the Conduct of Parties in the South China Sea," has
eased tensions in the Spratly Islands but falls short of a legally
binding "code of conduct" desired by several of the disputants; in
March 2005, the national oil companies of China, the Philippines,
and Vietnam signed a joint accord to conduct marine seismic
activities in the Spratly Islands; Philippines retains a dormant
claim to Malaysia's Sabah State in northern Borneo based on the
Sultanate of Sulu's granting the Philippines Government power of
attorney to pursue a sovereignty claim on his behalf; maritime
delimitation negotiations continue with Palau

Pitcairn Islands
none

Poland
as a member state that forms part of the EU's external
border, Poland must implement the strict Schengen border rules to
restrict illegal immigration and trade along its eastern borders
with Belarus and Ukraine

Portugal
Portugal does not recognize Spanish sovereignty over the
territory of Olivenza based on a difference of interpretation of the
1815 Congress of Vienna and the 1801 Treaty of Badajoz

Puerto Rico
increasing numbers of illegal migrants from the
Dominican Republic cross the Mona Passage to Puerto Rico each year
looking for work

Qatar
none

Romania
the ICJ gave Ukraine until December 2006 to reply and
Romania until June 2007 to issue a rejoinder in their dispute
submitted in 2004 over Ukrainian-administered Zmiyinyy/Serpilor
(Snake) Island and Black Sea maritime boundary delimitation; Romania
also opposes Ukraine's reopening of a navigation canal from the
Danube border through Ukraine to the Black Sea

Russia
China and Russia have demarcated the once disputed islands at
the Amur and Ussuri confluence and in the Argun River in accordance
with the 2004 Agreement, ending their centuries-long border
disputes; the sovereignty dispute over the islands of Etorofu,
Kunashiri, Shikotan, and the Habomai gr