[DRG]

If I understand the question correctly then yes, if they are spotted and fired on the units with restricted range will return fire even if the range has been set to 100m for example and the enemy is firing at them from 200m. The point of holding fire is to surprise the enemy. If the enemy has spotted and fired on you the "surprise" is gone along with the need to hold fire until 100m. However, it will only be the unit fired on that will return fire not every unit in sight that may also have had their firing range restricted. Until actually fired on the unit will "assume" it's not been spotted

You can test that easily enough with a simple little sceanrio

Don