You better learn something about all of them so you know the role of your partners and what you have to do. You never know when you are going to be put in any of those positions at any time (even the Referee) so you better learn all of them to some extent. And it will help you in the long run as an official.
Peace
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Let us get into "Good Trouble."
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Charles Michael “Mick” Chambers (1947-2010)
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