4. Leaven taken from the dough to be used to cause other doughs to rise should be taken before challah is separated. However, leaven which is taken to cause borscht to ferment must be taken after challah has been separated.
5. After Pesach, when yeast is purchased from a gentile to cause dough to rise, the portion separated as challah must be larger than the quantity of yeast.
6. When dough is made to be cooked or fried, one should separate challah without reciting a blessing. If even a small portion of the dough was made to be used for baking, one should separate challah with a blessing.