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, 27 May 2007
in regards to: this
So technically the order would be:
Player A (with stronghold Broken Wave City) announces Naval, then announces "I will attach a card from my hand as my battle action"
Player B has the opportunity to play reinforce the gates before Player A has to show the proposed card to be attached from his hand?
Zen Faulkes (rules official), 27 May 2007
in regards to: this
So technically the order would be:
Player A (with stronghold Broken Wave City) announces Naval, then announces "I will attach a card from my hand as my battle action"
Player B has the opportunity to play reinforce the gates before Player A has to show the proposed card to be attached from his hand?
There is no requirement for showing the card a Broken Wave City player wishes to attach when the action is announced.