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, 17 October 2007
Winter Storm Winter Until the end of the game, after each time an attack is declared, each player targets two of his unbowed Personalities with a Gold Cost eqal to or less than his Stronghold's Gold Production plus 2. Bow them.
Kazumasa Badger Clan • Samurai • Scout • Mountaineer • Advisor from the Shogun • Unique Reaction: After an action or Event with the Winter or Mountain keyword resolves, even if Kazumasa is bowed: Draw a card. Straighten Kazumasa.
Do I get to draw a card and straighten Kazumasa each time an attack is declared when Winter Storm is in effect?
Martin Lund (rules official), 18 October 2007
Winter Storm Winter Until the end of the game, after each time an attack is declared, each player targets two of his unbowed Personalities with a Gold Cost eqal to or less than his Stronghold's Gold Production plus 2. Bow them.
Kazumasa Badger Clan • Samurai • Scout • Mountaineer • Advisor from the Shogun • Unique Reaction: After an action or Event with the Winter or Mountain keyword resolves, even if Kazumasa is bowed: Draw a card. Straighten Kazumasa.
Do I get to draw a card and straighten Kazumasa each time an attack is declared when Winter Storm is in effect?
No. "Produces an Effect," is not the same thing as "Resolves." The Event resolves one time (barring outside effects) during the Events Phase. Any On-Going Effects, Delayed Effects, Continuous Effects, Triggered Effects, or effects of the Event's Activated Abilities that may hang around after the fact don't change that.