Helsinki Convention on the Protection of the Marine Environment of the Baltic Sea Area Finland, Germany, Latvia, Lithuania, Poland, Russia and Sweden. The Convention on the Protection of the Marine Environment of the Baltic Sea Area, 1992, entered into force on 17 January 2000. The States-Parties to the Convention agreed individually or jointly to take all appropriate legislative, administrative or other relevant measures to prevent and eliminate pollution in order to promote the ecological restoration of the Baltic Sea Area and the preservation of its ecological balance. The Parties undertake to apply: The aim of the States-Parties to the Convention is to prevent and eliminate pollution of the marine environment of the Baltic Sea
Latvia–Russia border On 16 January 1945, the area was transferred from the Latvian Soviet Socialist Republic to Pskov Oblast and renamed Pytalovsky District. Ever since Latvia regained independence, Latvia claimed the previous Latvian territory, on the basis of the 1920 Treaty of Riga. In 2007 a treaty on the Russian-Latvian state border was signed and ratified, and the Pytalovsky District remains part of Russia. Passage of the state border between the Russian Federation and the Republic of Latvia is determined on the basis of arrangements. According to the agreement on the Russian-Latvian State Border, the state border between Latvia and Russia starting