You mean, aside from Table 6-5: Aging Effects?
This was directed at the OP, but
as for the OP....yes, aside from Table 6-5. If a character is 50 years old, gains a level, and picks up a new Feat, shouldn't that Feat selection be conditional to the character's age?
I have no rule for old age in my game,
but I do take a somewhat non-standard view of the definition of a character level.
In my game, character levels are static. Level 1 represents a novice while I have an absolute ceiling of Level 20. Therefore, character level is usually tied, somewhat, to character age.
It's rare to find a Level 1 character older than 14-17 in my game. Why? That's how old most people are when they begin their "careers". You're not going to walk into a town in my game and see the entire town militia composed of a few dozen Level 1 characters--not unless the town militia is protected by a bunch of 15 year-old kids.
In my game, I define a character level to be:
The average amount of experience a character obtains in a year.
Thus, if you see a 13 year old, he's most likely 1st level. If you see a 20 year old character, he'll be in the
The older a character is, the easier it is to guess his experiece level.
Consider....
Age 15-16 = Level 1
Age 16-18 = Level 2
Age 18-21 = Level 3
Age 22-26 = Level 4
Age 26-31 = Level 5
Age 31-37 = Level 6
Age 37-42 = Level 7
Age 42-50 = Level 8
Age 50-59 = Level 9
Age 59-69 = Level 10
Age 69-80 = Level 11
Age 80-92 = Level 12
And so on, to the level cap at Level 20.
As you can see, on average, most people reach level 8-11 in their lives, if they live that long. The Commoner class uses the above as a Rule of Thumb, as well. And, remember that these are eyeballed, ballparked numbers. The scale is not absolute. The fighter that spends his whole career as a city guardsman can probably use the above Rule of Thumb. A fighter of the same age and exact same stats, living on the Empire's frontier with a hostile force, would average a level or three higher than the norm.
The PCs are above average people. Heroes. Thus, they will average higher than the common joe and have a shot at obtaining Level 20.