study sourec B. How did Aztecs choose their leader?

"Emperors (tlatoani) were elected by a high council of four nobles who were related to the previous ruler. Emperors were usually chosen from among the brothers or sons of the deceased ruler. They were required to be nobles, to be over the age of 30, to have been educated at one of the elite calmecac schools, to be experienced warriors and military leaders, and to be just. Although the emperor had absolute power and was believed to be a representative of the gods, he governed with the assistance of four advisors and one senior advisor who were elected by the nobility."