Our "mandatory" chapter officers are:
President
Vice President
Secretary
Treasurer
Historian
Warden (guards the door and is custodion of ballot box and certain other chapter equipment; other duties as chapter may assign)
Alumni Secretary
Fraternity Education Officer (FEO)(responsible for probationary membership program)
Faculty Advisor
Chapters may, and often do, establish other offices, such as rush chair or songleader.
As for ritual, I'll just plead the fifth on who's responsible.
