The Prime Minister is the third highest rank of officer in a chapter. His job is to oversee all of the chapter paperwork, from sign-in sheets, waivers, and other forms to handling the group's finances and collecting money during fundraisers. This office is an elected one, and as such can be sought by anyone over the age of 18.
NOTE: Any Prime Minster found to have stolen funds is immediately stripped of rank, permanently banned from Wandering Ronin, and has criminal charges pressed against them. The theft of chapter funds is a serious crime, and shall be treated as such.
In different chapter levels, the Prime Minster is known by different titles. Below is the list of those titles, by chapter:
Fief - Magistrate
Province - Marshal
Prefecture - Minister
Empire - Prime Minister