What rule does Jonas father disobey in the giver?

The Giver by Lois Lowry presents a dystopian society where strict rules and regulations are imposed on its citizens to maintain order. Jonas's father, described as the Nurturer, is responsible for overseeing the newborn children and assigning them to families. However, he disobeys one particular rule by nurturing and caring for a set of identical twin boys, Gabriel and another twin, against society's policy of restricting only one child per family unit. This act of defiance demonstrates his compassion and willingness to challenge the establishment for the well-being of the children.