Relations between the two countries are strained following a border dispute, which makes dealing with common problems difficult.
Mr Tannock said he hoped negotiations would be able to start in June, adding that Montenegro was a "champion of regional co-operation" such as resolving a border dispute with Croatia and fighting organised crime.
Any state in a border dispute with another can petition directly to the high court under judicial powers defined in Article III of the Constitution, according to Joseph Zimmerman, a political-science professor at the University at Albany, State University of New York, and the author of several books on interstate disputes.
WSJ: In Latest War Between the States, Georgia Says Tennessee Is All Wet
Eritrea has a hot border dispute with Ethiopia which could easily ignite.
Russia's natural resources minister Jurij Trutnev, meanwhile, has been making optimistic noises in recent weeks about the likelihood of a resolution of a long-standing border dispute between the two nations over a 155, 000 square kilometres "grey area" in the Barents Sea.
Belize's independence was delayed by a long-running border dispute with Guatemala, which refused to recognise its neighbour's independence until 1992.
This place, a nesting ground for the Atlantic puffin, is also at the centre of a long-rumbling border dispute between America and Canada.
Since South Sudan's independence, tension between the new neighbours has been strained, with rebellions breaking out on either side of the border and a dispute over oil which escalated to the brink of war last April.
The Malawian government admits that this border dispute is a source of concern, but its economy needs oil, to diversify away from tobacco.
CNN: Troubled water: Oil search fuels tension over Lake Malawi
Mr Mahuad, whose big achievement was to end a futile 60-year border dispute with Peru and cut military spending, claims he was the victim of army revenge.
Mr Vasquez, in office from 2005 to 2010, said he had weighed a war option amid a dispute with Argentina over a pulp mill on their border.
BBC: Uruguay ex-head Vasquez quits politics over war comment
The dispute with Peru is over a maritime border in the Pacific, which the Peruvians took to the International Court of Justice in The Hague.
Why, that he had had business dealings with the armed forces of Ecuador, a country with which Peru has a long-standing, and occasionally briefly flaring, border dispute.
So his departure could hurt the chances of resolving the Arab-Kurdish dispute over land and oil in the border region around Kirkuk, a city and province which the Kurds say is theirs.
The cause: a dispute over which country should control a Buddhist temple after France decades ago demarked the border between the countries.
The union said the dispute is to be escalated, with a week of strikes at the Home Office and UK Border Agency.
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