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.
Hachigoro, if i control no units at the battlefield can i still use his battle action cause it would bring him into play for the rule of presence?
Can Reactions on personalities, from other locations be used at the current battle field? Example: Battlefield 1 and 2 have the same personality, but battle one is the current battlefield. i use the personality's reaction at battlefield 1, can i use the one at battle field to also?
Hachigoro, if i control no units at the battlefield can i still use his battle action cause it would bring him into play for the rule of presence?
No. You can satisfy the exception to the Rule of Presence by moving a Personality to the current battlefield, but This Exception does not apply to effects that create a unit, or cause a unit to enter play at the current battlefield; such effects still require pre-existing Presence.
Can Reactions on personalities, from other locations be used at the current battle field?
Yes. Only Battle actions are subject to the Rule of Location.