The United Nations Security Council unanimously approved a resolution, Wednesday, that would place non-military sanctions against Sudan and South Sudan if the countries don't stop ongoing border violence and return to negotiations.
The measure would legally bind the countries to an African Union policy, holding them to strict responsibilities and a timeline that would resolve their border disputes and differences over oil resources and revenues.
The U.N. measure would also condemn troop movement across the border and any act to overthrow or kill the other country's leader.
Since becoming a nation, South Sudan has faced continuous religious violence and deadly land disputes with Sudan.
Leaders from South Sudan are on board, but Sudan's U.N. Ambassador Daffa-Alla Elhag Ali Osman is skeptical.
Osman insists that peace will only come when the South stops "all forms of support and sheltering" of rebel groups.
South Sudan seceded last year as part of a 2005 peace treaty that ended decades of war that killed two million people.
China and Russia, countries that usually oppose sanctions, voted in favor of the measure.