Reaction fire after having fired in the turn

In my latest game a number of issues arose that I will post one by one (there were four in total).  All relatively minor and didn't spoil what was an excellent and very exciting, tense game.  

My AAR can be found here: https://onesidedminiaturewargamingdiscourse.blogspot.com/2019/05/burgundian-ordonnance-versus-richard.html

Can a unit that has already been activated subsequently perform reaction fire later in the same turn? Reference Page 39.

Yes, as long as the unit hasn't already reacted earlier in the turn. We mark units once they have reacted as it can be quite challenging to remember.

Thanks. Interesting as I hadn't considered this and can see that it opens up some options for tactics.