age categories for tiefling/aasimar

[ristan]

I can't seem to find these anywhere.
Do they age like humans or are they longer lived?

Age seems to be often ignored in everything but the PHB.
NPC stat blocks seem to never mention age either. I wonder why this is?

 

[Kamard]

Lacking better rules (aka, any rules) I would immediately rule that they have the same aging rules as a half-elf.