Article 7, paragraph 7, of the UEFA edition of the Constitution of the 2006-2008 European Football Championship clearly stipulates that the final of the competition
After the final round of the group stage, if two or more teams share the points, the qualifying rights shall be calculated in the following order: 1. Competing scores; 2. Differences in their goals; 3. The overall goal of each other; 4. Group goal difference; 5. The overall goal of the group stage; 6. The integral coefficient in the qualifying stages of the 2006 World Cup and European Cup (integral divided by the number of matches); 7. Fair play score in the final stage; 8. Draw lots.
However, different from the last European Cup, this time UEFA provided an opportunity for a direct confrontation and all winners after the third condition: according to the exception of Article 7, paragraph 8, if the points, goal difference and total goals of the two teams with the same score are the same, and the final round happens to be the same opponents, then the fourth to eighth decisive conditions will be replaced by penalty shootouts. In other words, in extreme cases, it is indeed possible to have a penalty shootout for the first time in the group stage.
References:
/Sports/Content/2008-06/06/Content _ 499481.htm