Article 31
There are seven conditions for the Khalifah to be contracted, which are: to be male, Muslim, free, adult, sane, just, and from the people who have the capability.
Since the Khilafah is a part of the ruling (guardianship), or rather it is the greatest guardianship, for that reason the text of the 19th article is mentioned here, in other words, the obligation for the seven mentioned conditions to be fulfilled:
The evidence that the Khalifah should be male is what has been narrated from the Messenger (pbuh) that when he heard that the Persians had given the rule to the daughter of Kisra, he said.
. » لَنْ ي فُْلِحَ قَ وْمٌ وَلَّوْا أَمْرَهُمُ امْرَأَة « .
“Never will succeed such a nation that makes a woman their leader.” (narrated by Al-Bukhari from Abu Bakrah); this narration contains a decisive prohibition regarding a woman being appointed the leader of a State, since the expression “never” indicates permanency, which is an exaggeration in negating the success, so it is a blame, which means that the request to leave the Khalifah from being a woman is a decisive request, and for this reason it was made a condition that he should be male.
As for the condition that he should be Muslim, this is due to His (swt) words. “And never will Allah give the disbelievers over the believers a way [to overcome them].” (TMQ 4:141), which is also a decisive prohibition since the expression “never” indicates permanency, and is information with the meaning of a request. As long as Allah (swt) prohibited the disbelievers having a way over the believers, then He (swt) prohibited for them to be made rulers over them, since the rule is the greatest way over the Muslims. Additionally, the Khalifah is the person of authority, and Allah (swt) made it a condition that the person of authority should be a Muslim. Allah (swt) said. “O you who have believed, obey Allah and obey the Messenger (pbuh) and those in authority among you.” () and He (swt) said. “And when there comes to them information about [public] security or fear, they spread it around. But if they had referred it back to the Messenger (pbuh) or to those of authority among them.” (). The words “people of authority” are not mentioned in the Quran unless it is also mentioned that they are from the Muslims, which indicates that the person of authority must be a Muslim. And since the Khalifah is the person of authority, and he is the one who appoints the people of authority, then it is a condition that he must be a Muslim.