Various rules regarding divorce
2545. If a man had sexual intercourse with a non-mehram woman under the impression that she was his wife, the woman should observe Iddah, irrespective of whether she knew that the man was not her husband or thought that perhaps he was her husband.
2546. If a man commits fornication with a woman knowing that she is not his wife, it is not necessary for the woman to observe Iddah. But if she thought that the man was probably her husband, as an obligatory precaution, she should observe Iddah.
2547. If a man seduces a woman so that her husband decides to divorce her and then she can marry him, the divorce and marriage are in order, but both of them have committed a major sin.
2548. If a woman lays a condition at the time of Nikah that if her husband goes on a journey or, for example, does not give her maintenance for six months, she will have the right of divorce, the condition is void. However, if she lays a condition that if her husband goes on a journey or, for example, does not give her maintenance for six months, she will be his Wakil for her own divorce, the condition is in order.
2549. If the husband of a woman disappears and she wishes to marry another man, she should approach an 'Adil Mujtahid and act according to his directive.
2550. The father and the paternal grandfather of an insane man can divorce his wife.
2551. If the father or paternal grandfather of a child contracts a temporary marriage between him and a woman, and a part of the period fixed for the marriage covers some of the time when the child will have attained the age of bulugh, for example, if he contracts the marriage of a fourteen years old boy for a period of two years - he (the father or the paternal grandfather of the child) can exempt the woman from a part of the period of marriage if doing so, is in the interest of the child, but he cannot divorce the child's permanent wife.
2552. If a man considers two person to be just ('Adil) according to the standard prescribed in Shariah, and divorces his wife in their presence, another person to whom their being 'Adil is not proved can, after the expiry of that woman's Iddah, marry her or give her in marriage to another person, although the recommended precaution is that he should not marry her nor should he give her in marriage to someone else.
2553. If a person divorces his wife without informing her, and he continues to maintain her the way he did when she was his wife, and after a year tells her that he divorced her a year ago, and also proves it, he can take back from her the things which he supplied her during that period if she has not used them up, but he cannot demand from her the things which she has already expended.