A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 27 May 2013
Is the new action type Interrupt interchangable with the action type Reaction for the purposes of the rules in EE?
Under current EE rules, if i am not mistaken reactions can be taken by personalities who are not at a battle as long as i have presence at the battle? pls correct me if i am wrong. So would this mean for the purposes of EE play would Moto Taigo exp's interrupt reaction be usable if he was not at a battle and someone moved a unit in or out of a battle?
Regards
Brook Cunningham (rules official), 15 June 2013
Is the new action type Interrupt interchangable with the action type Reaction for the purposes of the rules in EE?
No.
http://rules.l5r.com/EE_Battles#B._Combat_Segment: "Engage, Battle and Interrupt actions must follow the additional rules of Presence and Location. Reactions are not subject to rules of Presence and Location."