Governance Positions are in a flat table and define your association’s governance positions that are held by individuals. These MasterCodes populate the Position field drop down menu when a position is assigned to a contact record via a Committee folder in the AMS. 
You may add EXLD=YES in the Instructions field of the MasterCode for a position, like a staff liaison, if you wish to exclude them from the AMS rosters and the public website display of a committee’s officers.
The Role Name field is optionally used at the MasterCode level to allow certain committees and/or position holders to access restricted content on the association’s website. You can create as many Role Names as you need to allow for more than one way to restrict access. Thus, a committee can have its own restricted pages for its members, and some of those pages or modules could be further restricted to specific officers of the committee.
The roles shown are roles defined on your website. The role must first be created there before it can be assigned here. See Adding NOAH Roles.