The second ballot is based on the principle that a successful candidate must obtain

The second ballot is based on the principle that a successful candidate must obtain an absolute majority. This means that in order to win, the candidate must receive more than half of the total votes cast. In other words, the candidate must get at least 50% plus one of the votes. This ensures that the winning candidate has the support of the majority of the voters, rather than just a plurality of the votes. If no candidate receives an absolute majority in the first round of voting, a second ballot is held between the two candidates who received the most votes, to determine the winner.