Articles 95, 97, 98, and 99 describe the distribution of seats to parties and alliances and the two-round system. The calculation is done in a preliminary and, if necessary, a final round, and it is the preliminary round which decides whether a second round is necessary. The distribution formula is the method of the "largest remainder", applied to the results of the parties and alliances passing the threshold. According to Article 95.3.1, if a party or alliance wins at least 53 seats out of the 105 seats (101 seats plus four minority seats), the first round is final.