 Under Spanish law they must be at least four years old and reach the weight of 460 kg to fight in a first-rank bullring, 435 kg for a second-rank one, and 410 kg for third-rank rings.They must also have fully functional vision and even horns (which have not been tampered with) and be in generally good condition.A very few times each year a bull will be "indultado", or "pardoned," meaning his life is spared due to outstanding behavior in the bullring, leading the audience to petition the president of the ring with white handkerchiefs.