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, 25 November 2011
(related to viewtopic.php?f=59&t=94949 )
http://rules.l5r.com/CE_Physically_mark ... Overlaying "The stack has the overlaying card’s title, stats, keywords, traits, and abilities, and any other feature the game needs to check is based on the overlaying card. The stack also inherits the base abilities of all underlying cards, even ones that have been removed. Inheriting is not an ability gain. For purposes of delayed effects on a particular card, and for effects that track whether a card remains in play, the overlaid card is considered to be the same card as the underlying card. The underlying card’s attachments, tokens, and game state, including ongoing effects, also apply to the new stack. This process does not transfer or attach anything, or begin or end any game state on a card. Specifically, existing minimums, maximums, bonuses and penalties to the underlying card’s stats will transfer to the overlaying card. "
If the personality brought into play by Your Clan Needs You and later given a delayed effect before being returned to province is overlaid instead of brought into play normally during the dynasty phase, does the delayed effect still apply?
Brook Cunningham (rules official), 25 November 2011
(related to viewtopic.php?f=59&t=94949 )
http://rules.l5r.com/CE_Physically_mark ... Overlaying "The stack has the overlaying card’s title, stats, keywords, traits, and abilities, and any other feature the game needs to check is based on the overlaying card. The stack also inherits the base abilities of all underlying cards, even ones that have been removed. Inheriting is not an ability gain. For purposes of delayed effects on a particular card, and for effects that track whether a card remains in play, the overlaid card is considered to be the same card as the underlying card. The underlying card’s attachments, tokens, and game state, including ongoing effects, also apply to the new stack. This process does not transfer or attach anything, or begin or end any game state on a card. Specifically, existing minimums, maximums, bonuses and penalties to the underlying card’s stats will transfer to the overlaying card. "
If the personality brought into play by Your Clan Needs You and later given a delayed effect before being returned to province is overlaid instead of brought into play normally during the dynasty phase, does the delayed effect still apply?
Yes, the delayed effect still applies.
Although the rules you quoted don't address such a situation as the one you describe, it being a bit unusual, nothing in those rules says that such an effect would go away or be overridden. Therefore, it remains.