What change does Claudius templesmith announce at the end of part 2?

At the end of Part 2 of "The Hunger Games," Claudius Templesmith announces that this year, the rules of the Hunger Games have changed: if two tributes from the same district are the last ones standing, they can both be declared winners. This unexpected twist sparks hope among the tributes, especially those from the same district, as it alters the dynamics of the competition.