My work also has similar thing. Every calendar month gives the sick & vacation hours. Vacation has soft ceiling of 240 hours (no time frame). Once over 240 hour

My work also has similar thing. Every calendar month gives the sick & vacation hours. Vacation has soft ceiling of 240 hours (no time frame). Once over 240 hours, Manager's have to devise & suggest a plan to keep the total under limit, which could be an extra day off every month to counter the new accural & some planned days off to bring total near 180.