A fully staffed WFTDA flat-track roller derby game requires at least 18 volunteer officials to run, and that’s not counting track crew and announcers. Each one of these people plays a core part in ensuring that safe, fair gameplay occurs. This document will summarize each of the officiating positions.
Pro tip: Every league does things a little differently; treat this guide as just a rough start. Unless something is actually violating the rules, plan to roll with whatever the host league / host ref crew prefers.