Office business manager: Exempt or nonexempt?

Q. We're a nine-physician medical clinic, and we employ a salaried business manager. She makes less than $100,000 but more than $23,660 per year. Her duties include personnel, hiring and firing, and office work. We don't give her comp time or overtime pay. If she takes a partial day off, she must use vacation time (paid time off). In light of the new (FLSA, overtime) rules, are we handling this correctly? —B.B., Missouri