Laws of Mourning After the Festival When a Relative Dies During Chol Hamoed

If one's father passed away during Chol Hamoed, what mourning practices are observed after the festival?

After the festival, one observes seven days of all the laws of Shiva. However, others are not prohibited from doing his work in their homes or in his home discreetly, and if it is a matter of loss, others are permitted to do his work in his home even publicly. If it is not possible for others to save the matter, he is permitted to do it himself even in the first three days. Therefore, his wife is allowed to wash his clothes discreetly and hang them at home, because the prohibition of washing his clothes is due to the prohibition of work. Also, people do not come to comfort him since they comforted him during the festival. (In our times, when the custom is not to comfort during the festival, they come to comfort after the festival.)

Shulchan Aruch, Yoreh De'ah, Siman 399, Seif 1: "Seven days are counted after the festival, and during those seven days, his work is done by others, and his servants and maidservants do it discreetly in his house, since he was already exempt from work during the seven days of the festival, although not due to mourning but due to the festival, ultimately, he observed the laws of mourning regarding work, therefore, one should not be strict with him as in regular mourning, and his work is done by others. Throughout the festival days, many engage in comforting him, therefore, after the festival, they do not engage in comforting him." And what I wrote that he is permitted to engage in a matter of loss himself discreetly: it is said in Moed Katan, page 20, column 1: "If buried at the beginning of the festival, seven days are counted after the festival, and his work is done by others, and his servants and maidservants do it discreetly in his house." In Siman 380, Seif 5, the Shulchan Aruch wrote that a mourner is permitted to do his work through others in a matter of loss. The Rema wrote to be lenient when it is impossible through others, to do his work himself in great loss within three days or in a matter of loss after three days. Mishnah Berurah, Siman 548, Subparagraph 22, regarding one who lost a relative during the festival, permits work after the festival through others discreetly, and his words: "Even in a matter that is not a loss, in a matter of loss, it is permitted through others even in his house and even in the first days after the festival, as stated in Yoreh De'ah, Siman 380, Seif 5, and see in Levush, who wrote that if it is a matter of loss, it is permitted to do it himself, and in Maamar Mordechai, he doubts it, but if it is not possible to do through others, and it is a matter of loss, perhaps in our case, one can rely on the opinion brought there in the gloss: (and his intention is to rely on the opinion that permits in a matter of loss himself even in the first three days and without great loss when it is not possible through others)