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, 12 May 2012
Winter Sled: (0F/0C item)
While you control a Winter card, other players' cards' effects will not negate this Personality's movement. Reaction: After engaging, if any enemy units are at the current battlefield, bow this card: Move this Personality there.
Question: there are a number of strategies out there with the Winter keyword (e.g. The Snow Has Teeth). Once such a strategy is played and it exists in your discard pile (ie. it's not removed from the game), does it count as a winter card under your control for the purposes of Winter Sled?
Jon Palmer (rules official), 13 May 2012
Question: there are a number of strategies out there with the Winter keyword (e.g. The Snow Has Teeth). Once such a strategy is played and it exists in your discard pile (ie. it's not removed from the game), does it count as a winter card under your control for the purposes of Winter Sled?
Per the rules on card control, the card must be in play to be controlled. Therefore for the most part a strategy will not count as being controlled, unless it is currently in play (Deep Snows being the only currently legal example of such a card).