(a) Reasons of health, which shall include any health condition which, in the written opinion of a medical doctor, would be harmful to the health of the candidate if he or she continued.
(b) Family crises, which shall include circumstances which would substantially alter the duties and responsibilities of the candidate to the family or to a family business.
(c) Substantial business conflict, which shall include the policy of an employer prohibiting employees being candidates for public offices and an employment change which would result in the ineligibility of the candidate or which would impair his or her capability to properly carry out the functions of the office being sought.