Second, you must have worked for the employer for at least 1250 hours in the 12 months before you take leave. That works out to an average of about 24 hours per week over the course of a year. Lastly, you must work at a location where the employer has at least 50 employees within 75 miles of your worksite.ou meet the hours of work requirement if, during the 12 months prior to your need for leave, you have worked or been paid for at least 60% of your applicable monthly guarantee, and have worked or been paid for at least 504 hours, not including personal commute time, or time spent on vacation, medical or sick leave.