Rookie Official Question

[Spence]

Let me ask one more positioning type question.

The manual says that officials always switch positions after a foul. Is that 100% or , like the thinking on the jump ball, a "usually?"

For example, I'm trail and call a foul. I report it to the table. Do I then become the lead and administer the FT? Or , in that situation, do we not switch in order to keep the game moving?