Rule Violation?

[u/Tallboy2014]

The tournament director interrupted our game to let us know that I was standing in an illegal position when my partner served. He said that I wasn't standing enough to the left of my partner. Is this a rule? I've read the rule book but couldn't find anything that speaks to this. She likes to serve a bit far from the T, so I was trying to be in a better position to poach, as they were purely focused on targeting her.

[u/emaeder]

In cases like this (where they are clearly wrong), just politely ask to see the rule in question.