Way back in the 1950-60s, when field clocks were something new, and rare, our Organization declared that our members would provide ECO services, and that has been the case since. Members (Officials) are assigned as any other field official assignment, are members of the game crew, and as such wears a full uniform while attending to operating the game clock.
Our Clock Operators also serve as potential back-ups, should any of the field crew become unable to continue and the game clock would then be operated on the field.
The wisdom of those former members has served our chapter, and area football well, these 60-70 years.