It is actually up to the employer. My employer allows persons to take family leave without using sick leave but my wifes employer only allows family after sick leave has been used up. From the act: An eligible employee may elect, or an employer may require the employee, to substitute any of the accrued paid vacation leave, personal leave, or medical or sick leave of the employee for leave provided under subparagraph (C) or (D) of subsection (a)(1) for any part of the 12-week period of such leave under such subsection, except that nothing in this title shall require an employer to provide paid sick leave or paid medical leave in any situation in which such employer would not normally provide any such paid leave.
