When you watch them walking around, a pathway or line of direction is not apparent. The route resembles a poorly defined arc.
If they are unable to weight bear, they should be able to do 5 bilateral upper extremity range of motion exercises, after stretching their hands and joints.
To Verify
A daily schedule for each person needs to accommodate their sense of fatigue. Upper and lower extremity range of motion exercises can be done while seated, with about 5 repetitions and rest periods in a 30 to 45-minute session, twice a day.
To Rule Out
The difference between ACL 2.4 and 2.6 is having a sense of direction when walking. Within ACL 2.4, when asked where they are going, they will probably ignore the question because it does not mean anything to them. When walking around a large room or space, they do not follow a "path". They look like they are wandering within a room as oppose to going around the edge of the room.