(CNN) Turkey voted Sunday on a referendum designed to hand the country's President Recep Tayyip Erdogan sweeping powers. Voters were asked to endorse a reform package that would replace the current system of parliamentary democracy with a powerful executive presidency. Official results have not yet been released, and the opposition promised to contest at least a third of the votes cast. But unofficial results from a state-run agency show Erdogan winning by a small margin, with 99.8% of the ballots counted. Here's what stands to change in Turkey if the "yes" vote on the referendum becomes official.

Source: CNN April 17, 2017 00:33 UTC