Does the permission sought by some of the Companions for jihad indicate that seeking the permission of the one in authority is obligatory?

Question:
He says: Honorable Shaykh, may Allah grant you success. Some of the Companions sought the permission of the Messenger (peace and blessings be upon him) for jihad, such as the one who informed him that his wife had gone out for a need, and that he had signed up for such-and-such an expedition. Likewise, the Companion who came to seek his permission for jihad, to whom he said, "Do you have two parents?" Does this also indicate that seeking the permission of the one in authority is obligatory, or is it only an indication of individual incidents?

Answer:
Yes. The Prophet (peace and blessings be upon him) turned back the one who came to jihad wanting to sign up, whose wife had gone out for a need, meaning without a mahram (a relative one may not marry). Yes. In this case, jihad is a recommended practice (sunnah) for him, and the presence of a mahram with a woman is a condition of travel. Therefore, he (peace and blessings be upon him) sent him back with her. Likewise, dutifulness to parents is obligatory, and jihad in this matter is a collective obligation (fard kifayah). Since it remains a recommended practice (sunnah), the obligatory act takes precedence over the recommended practice for this man.
Likewise, obedience to the one in authority, because you are under his authority, so you do not go except with his permission. This is his intention regarding those who go to fight in other lands. It is necessary to have the permission of the one in authority in this matter. Yes.