How are the rulings of Islamic Sharia applied to Christians in matters of personal status, such as marriage, divorce, and inheritance, especially given the differences in the rulings of their religion, such as the impermissibility of divorce among Orthodox Christians?

Ibn al-Qayyim mentioned in his book "Ahkam Ahl al-Dhimmah" that the divorce of a disbeliever who does not believe in the occurrence of divorce is not valid, according to the more authentic of the two narrations. This is consistent with their principles, as he has not committed to the ruling of divorce. As for marriage, if disbelievers initially refer their case to a ruler, they are not married except under the conditions of Islamic marriage, in accordance with the Almighty's saying: "And if you judge, judge between them with justice." If they embrace Islam and refer their case after the marriage contract, their situation at the time of referral is considered. If the woman is someone whose marriage is permissible, they are affirmed; otherwise, they are separated.