How do we effectively separate FMLA leave from normal absences?

Q:  “Can an employer require an employee to state that a call-out is FMLA-related if the employee is on approved FMLA leave? Can the employer require that an employee on approved FMLA leave sign an agreement stating that if they don't state a call-out is FMLA-related, it will not be charged to the FMLA leave and they will incur attendance points?”  – Anonymous, Virginia