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, 23 April 2015
Previous ruling: Short Season and Hidden Machinations.
Here, Victory through deference doesn't give you a permission to take an additional action, it just stipulates "Take an additional action."
In that case, if Short Season has resolved, will VtD allow you to play it plus an additional action? --- Short Season Each player may take only one Limited or Open action per turn (after this Event enters play). Open: If you have not taken an action this phase, put this Event into play. Discard it after the current active player's next Action Phase begins.
Victory Through Deference As a Focus Effect, after you win this duel, remove one to three non-Ring cards in discard piles from the game. Invest : Draw a card. Battle/Open: Remove one to three non-Ring cards in discard piles from the game. You may target a Personality and remove one of his abilities or boldface keywords (this turn). Take an additional action.
Jon Palmer (rules official), 1 May 2015
Previous ruling: Short Season and Hidden Machinations.
Here, Victory through deference doesn't give you a permission to take an additional action, it just stipulates "Take an additional action."
In that case, if Short Season has resolved, will VtD allow you to play it plus an additional action? --- Short Season Each player may take only one Limited or Open action per turn (after this Event enters play). Open: If you have not taken an action this phase, put this Event into play. Discard it after the current active player's next Action Phase begins.
Victory Through Deference As a Focus Effect, after you win this duel, remove one to three non-Ring cards in discard piles from the game. Invest : Draw a card. Battle/Open: Remove one to three non-Ring cards in discard piles from the game. You may target a Personality and remove one of his abilities or boldface keywords (this turn). Take an additional action.
Victory Through Deference gives you a window to play an additional action, overriding the normal back-and-forth action sequence. However, it does not specifically contradict Short Season's limit on the number of actions, so you may not take a second action after playing Victory Through Deference.