FMLA allows up to 12 weeks of leave for an employee that invokes their rights under this statute. However, this law is complex and must be evaluated in conjunction with other laws, such as the ADAAA. Many times, employers who do not fully understand how FMLA works allow employees who are not entitled to FMLA leave to take the leave. For example, an employee that has not worked for a sufficient number of hours for your company may not be entitled to FMLA protection.