I'm currently running a D&D 3.5e game for The Shackled City Adventure Path and have allowed my players to use backgrounds provided for it to fit their character's in a little better if they so choose to.
One of my players has and have chosen to use the following background:
One of your ancestors was a half-black dragon. You have some sort of distinctively draconic feature, be it reptilian eyes, scales on the backs of your hands, or tiny vestigial horns on your head.
Benefit: You gain a +4 bonus on all saving throws against acid effects, a +2 bonus on Swim checks, and a +1 bonus on Listen and Spot checks.
Drawback: Your body isn’t quite as limber as it should be. You take a -1 penalty on Reflex saves
They've also taken the dragontouched feat to imply character's father was a dragon, or half dragon. Though this is something they did before the group was provided with the backgrounds option (an options I provided them with because one or two of the players were having trouble).
So I have been asked the question if they have taken the background, should I make them take the feat too to get the background benefits above given the player's written background?
My initial thought is yes, but that is then unfair on the player as other players haven't had to. Is there a wirtten rule that says this is or isn't the case?