If she has rejected him, or he has given permission, or the situation is unknown, then it is permissible …
His words, “If she has rejected him, or he has given permission, or the situation is unknown, then it is permissible,” indicate that the prospective suitor’s case falls into one of four situations:
The first is that his proposal is accepted, in which case it is prohibited to propose over his proposal.
The second is that he is rejected, and it is known that they have rejected him. In that case, it is permissible to propose, because his right has come to an end.
The third is that he gives permission. For example, I learn that he has proposed to this woman, so I go to him and say: “So-and-so, you have proposed to so-and-so, and my heart is attached to her. I would like you to allow me to propose to her.” If he gives permission, then it is permissible, because the right belongs to him, and when he waives it, it is waived. But if we know that he gave permission merely out of shyness and embarrassment, rather than willingly, then this is not permissible, because such permission is as though it did not exist. Or if we know that he gave permission out of fear—because the one asking his permission is an evil man who would harm him if he did not grant it—then one may not proceed. But if he gives permission freely, willingly, and voluntarily, then the second man may propose.
The fourth is when the situation is unknown: we do not know whether his proposal has been accepted or rejected. The apparent meaning of the author’s words is that one may propose, because the man’s right has not yet been established—like one who is bargaining for an item, over whom you may offer a higher price.
But the correct view is that it is not permissible, because this constitutes an infringement upon his right. The woman’s family may perhaps have inclined toward this suitor, yet have not given him their answer; then, when another proposal comes, they may turn away from him. Thus, the correct view is that when the situation is unknown, proposing is forbidden. This is indicated by both textual evidence and rational consideration: