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, 29 October 2013
Limited: Pay "x" Target an attachment with Gold Cost equal to or lower than the amount paid. Transfer it to any player's target Personality (this may change control of the attachment).
Does that ignore item restrictions such as "can only attach to "x?"" I only ask as it makes no reference to it on the card. Thanks!
A player, 29 October 2013
Restrictions on attaching are also checked when transferring attachments.
See here.