Hospital means a facility that is licensed as an acute care general hospital and provides in-patient surgical and medical care to persons who are acutely ill. Additionally, the facility’s services must be under the supervision of a staff of licensed physicians and must include 24-hour-a-day nursing service by registered nurses. Facilities that are primarily rest, old age or convalescent homes are not considered to be hospitals. Facilities operated by agencies of the federal government are not considered hospitals. However, the Plan will cover expenses incurred in facilities operated by the federal government where benefit payment is mandated by law.