We may not write loan contracts during [Chol] HaMoed. However, if he does not trust him, or if he has nothing to eat, then he may write.  We may not write Books [of Scripture], nor tefillin, nor mezuzos during [Chol] HaMoed. We may not correct a single letter even in the [Torah] scroll of the Temple court. R' Yehudah says: A person may write tefillin or mezuzos for his personal use; and he may spin the blue thread for his tzitzis, on his thigh.

He who buries his dead [relative] three days before a festival has the edict of seven [days of mourning] annulled. [He who buries his dead relative] eight [days before a festival] has the edict of thirty [days of mourning] annulled. [This is so] because they said: Sabbath is included [in the period of mourning] but does not interrupt [it]. Festivals [however] interrupt but are not included.

R' Eliezer says: From the time the Temple was destroyed Shavuos is like the Sabbath.  Rabban Gamliel says: Rosh Hashanah and Yom Kippur are like the festivals.  The Sages, however, do not agree with either of the two. Rather, Shavuos is like the festivals; Rosh Hashanah and Yom Kippur are like the Sabbath.

Garments may not be rent, shoulders may not be bared, and the mourner's meal may not be served, except by relatives of the deceased. The mourner's meal is only served on a set-up bed.  We may not bring [food] to the house of mourning neither on a tray, nor on a salver, nor in a decorative basket, but only in [plain] baskets.  We do not say the mourner's blessing during [Chol] HaMoed, but we stand in rows and offer consolation. They then dismiss the public.