http://www.ibisstreetsyndicate.com/motd/tos.html

Read the second rule in the TOS (link provided above). Although, senior admins are not mentioned in TOS, the term is generally accepted to describe as the first admin on the server. It should apply to Pub, ZM, and GG, as it prevents total anarchy over map changes and issues over map changes.

On the ZM server, admins do respect the senior admin concept (in there, they are more lenient as they talk amongst themselves and come to a general consensus to the map selections for the map vote).

I don't goto the GG server often enough to know whether the concept do apply there or not. I've witnessed it the one time when I randomly decided to just spectate the GG server, but that itself cannot be conclusive on my two cents on it.

However, I do like to reinforce the importance of that term, despite being an imaginative term.

P.S. Jigsaw, you still play starcraft/broodwar? I play UMS maps...particularly Helms Deep Annatar.