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, 25 June 2010
If I have two units in battle, one of it with targeted with Last Stand and my oponent plays Justly Earned Victory (for Force negation Battle action). When my personality targeted with Last Stand will be alone (second personality will be moved home / killed).
Are my peronality has / receive +6 Force from Last Stand ?
Last Stand Open: Target your Hero: While he is the only Personality in an army, he has +6F.
Justly Earned Victory Battle: Target your Personality: Move a target enemy Personality with lower Force or with fewer attachments home. Battle: Negate all current Force bonuses and penalties to cards at this battlefield from actions.
Dan Jacobson (rules official), 26 June 2010
If I have two units in battle, one of it with targeted with Last Stand and my oponent plays Justly Earned Victory (for Force negation Battle action). When my personality targeted with Last Stand will be alone (second personality will be moved home / killed).
Are my peronality has / receive +6 Force from Last Stand ?
Last Stand Open: Target your Hero: While he is the only Personality in an army, he has +6F.
Justly Earned Victory Battle: Target your Personality: Move a target enemy Personality with lower Force or with fewer attachments home. Battle: Negate all current Force bonuses and penalties to cards at this battlefield from actions.
Justly Earned Victory will not negate delayed effects that haven't occurred yet.
In your scenario, your Hero would have +6F.
If you were to attack alone with your Hero and Justly Earned Victory were used, the force bonus would be negated for the rest of the turn (even if your Hero became alone at another battle that turn).
A player, 2 July 2010
read this.
Isn't Last Stand an ongoing, not delayed effect?
Would the answer be different if the battle progressed this way?
Last Stand personality assigned to one battle. Non-Last Stand Personality assigned somewhere else (maybe with a Seiden Sanzo bonus or something). Either personality moves to the other's battle field. JEV is played. Non-Last Stand personality sent home.
Zen Faulkes (rules official), 2 July 2010
Isn't Last Stand an ongoing, not delayed effect?
Yes, but it doesn't matter. The main point is that the bonus hasn't applied.
Would the answer be different if the battle progressed this way? Last Stand personality assigned to one battle. Non-Last Stand Personality assigned somewhere else (maybe with a Seiden Sanzo bonus or something). Either personality moves to the other's battle field. JEV is played. Non-Last Stand personality sent home.
No. The effect begins anew every time the condition is met (http://rules.l5r.com/CE_Effects#Continuous_effects).