(emphasis added)SRD said:LEADERSHIP [GENERAL]
Prerequisite: Character level 6th.
Benefits: Having this feat enables the character to attract loyal companions and devoted followers, subordinates who assist her. See the table below for what sort of cohort and how many followers the character can recruit.
Leadership Modifiers: Several factors can affect a character’s Leadership score, causing it to vary from the base score (character level + Cha modifier). A character’s reputation (from the point of view of the cohort or follower he is trying to attract) raises or lowers his Leadership score:
(emphasis added)SRD said:Level Adjustment and Effective Character Level: To determine the effective character level (ECL) of a monster character, add its level adjustment to its racial Hit Dice and character class levels.
Use ECL instead of character level to determine how many experience points a monster character needs to reach its next level. Also use ECL to determine starting wealth for a monster character.
Jhulae said:Of course, the problem is that the whole thing breaks down when you look at completely 'level adjusted' societies.
A 10th level Drow priestess should have an 8th level Drow bodyguard, not a 6th level Drow bodyguard. Nevermind when you get to a race with an even higher ECL.
Corsair said:That is part of the problem I'm dealing with. But I'm also unclear on races with racial HD. Is a Lizardfolk Druid 6 a 6th level character or 8th? Considering that HD can grant feats, I'm inclined to equate them for this purpose. Otherwise a dragon could never normally take Leadership.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.