How did Pacal the Great change the rules of succession in the Mayan civilization?

Pacal the Great changed the rules of succession in the Mayan civilization by setting the precedent for rule to be passed down through a male relation.

To add, K'inich Janaab Pakal I was ajaw of the Maya city-state of Palenque in the Late Classic period of pre-Columbian Mesoamerican chronology. An ajaw is a pre-Columbian Maya political title attested from epigraphic inscriptions.