How to change the number of lords/parties in minor factions?

[Waybook]

Anyone know how I could reduce the number of lords and thus parties per minor faction?
I tried looking through the XMLs, but couldn't find it.

EDIT: I found it and made a mod:

Fewer Minor Faction Parties

Each minor faction gets 3 lords instead of 4 when starting a new game. This results in fewer mercenary parties.

www.nexusmods.com