A man wishes to become a chavair (trustworthy regarding tithes). What must he do?
Halachah 1 states that the commitments must be made in public, and trustworthy witnesses must testify both that he made the declaration and that he continually observes these practices.
Question 2
A chavair's daughter marries a common person. What is her halachic status regarding tithes?
Halachah 3 rules that the daughter of a chavair who marries a common person retains her observance until she acts in a way that arouses suspicion — her positive background is presumed to continue.
Question 3
A chavair is seen serving as a waiter at a common person's feast. What may onlookers assume?
Halachah 6 states that a chavair may not serve at such a feast unless all separations have been made under his supervision, so seeing him serve creates a presumption that the entire feast is properly tithed.
Question 4
A common person gives a chavair a coin and asks him to buy a bunch of vegetables. Is the chavair obligated to tithe the vegetables?
Halachah 8 rules that when acting as an agent for a common person, the chavair is not considered to be buying the produce for himself, so the obligation to tithe does not apply — the seller will tithe it knowing it is for the common person.
Question 5
A doctor who is a chavair needs to feed a sick common person from produce of questionable tithing (demai). What is the correct procedure?
Halachah 13 rules that when feeding a sick (but not mortally endangered) common person from a common person's demai, the chavair places it in the patient's hand — not his mouth — to reduce direct responsibility, and may never feed produce that is definitely tevel (untithed).