As used in this article, the following terms shall have the meanings indicated:
Wife or husband, child, mother, father, brother, or sister of the employee who resides with the employee as part of his or her household, provided that, within 30 days of the commencement of employment, an employee may submit to the Human Resources Department the name or names of any persons, limited to one woman and one man, who were responsible for raising the employee, whose names shall replace the employee's mother and/or father and in such event, the illness of either or both of such persons shall have the same effect, with respect to sick leave, as if such person or persons were in fact the mother and/or father of such person.
An absence from employment because of illness, accident, exposure to contagious disease, or attendance upon a member of the employee's immediate family who is seriously ill or suffering from the result of an accident and who, for such reason, requires the care or attendance of such employee.