Original sentence: According to the Constitution, presidential elections take place 90 days before the current president's term expires (usually December 11).The President is directly-elected nationwide by absolute majority
Edited sentence: According to the Constitution, presidential elections take place 90 days before the incumbent president's term expires (usually December 11).If that day is not a Sunday, the election is moved to the next Sunday.The President is directly-elected nationwide by the absolute majority of the valid votes (excludes nulls and blanks).The Sunday rule is also followed