Answer:
By 2006, the states of northern Nigeria came under the governance of Sharia Law. Sharia Law is a legal system based on Islamic principles and is commonly practiced in Muslim-majority countries. Some states in northern Nigeria have adopted Sharia Law as their legal system, alongside the secular legal system that is also recognized by the Nigerian federal government. The implementation of Sharia Law in Nigeria has been controversial and has led to conflicts between Muslims and Christians, who make up a significant minority of the population in some of the affected states.