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, 21 November 2009
It's pretty clear that if I have a Public Garden on a province, and another region flips up there, the new region attaches.
Does it work the other way around? I have a region attached to the province, and I flip up a Public Garden in the province. Does the Public Garden attach to the province?
Dan Jacobson (rules official), 22 November 2009
Does it work the other way around? I have a region attached to the province, and I flip up a Public Garden in the province. Does the Public Garden attach to the province?
Yes. It will attach.