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, 30 November 2014
At the current battle, I have a non-Yojimbo Personality. My opponent wants to Sudden Movement a Shugenja at home who has been casting a lot of Home Battle spells. At home, I also have a number of Yojimbo Personalities. If, as I believe, Interrupts also follow the rules of presence and location, is it legal for me to Interrupt my opponent's Sudden Movement with Final Sacrifice despite not having a Yojimbo target for it at the current battlefield?
Sudden Movement Battle: Target two Personalities controlled by the same player at different locations. Switch their locations. Straighten both their units as they move.
Final Sacrifice Interrupt: Target your Yojimbo. The action must target him, if legal.
Alex Jones (rules official), 2 December 2014
At the current battle, I have a non-Yojimbo Personality. My opponent wants to Sudden Movement a Shugenja at home who has been casting a lot of Home Battle spells. At home, I also have a number of Yojimbo Personalities. If, as I believe, Interrupts also follow the rules of presence and location, is it legal for me to Interrupt my opponent's Sudden Movement with Final Sacrifice despite not having a Yojimbo target for it at the current battlefield?
Sudden Movement Battle: Target two Personalities controlled by the same player at different locations. Switch their locations. Straighten both their units as they move.
Final Sacrifice Interrupt: Target your Yojimbo. The action must target him, if legal.
The Yojimbo you target with Final Sacrifice must be at the current battlefield, because, as you correctly point out, Interrupts are subject to the Rule of Location (and Presence) - regardless of the targeting specification of the original action.