How many should a soldier wear that has 1 permanent ASUA and PCS's to a new unit that has 2 temporary (for the SM) awards of the ASUA?
Now to get soldiers to realize it is the only problem...
To answer your specific question, it would be: ASUA with 2 OLC (making a total of 3) for temporary wear while assigned to said unit, reverting back to a single ASUA when they PCS out. The regulation states that they can only wear temporary unit awards while actively assigned to that unit, and that the rule for OLC to count additional iterations of the same award is the same as individual awards. But soldiers have to understand that they cannot wear temporary unit awards on an official DA photo (as those will not show up on an ERB/ORB).
Now, in reality, unless the leadership is very anal about ASU's looking "correct" and uniform, many soldiers who already have permanent wear unit awards will typically forego temporary awards and only wear their permanent ones.
unit award and is subsequently assigned to a unit that has received the
same unit award, the soldier will wear the permanent award in lieu of
the temporary unit award."