Talking with Umpires - Manager only or Coaches too?

[Yappi]

I know that there are different governing bodies and the answer may be different. Ran into a situation recently with an umpire that would only talk to the Manager. Is this in the rules? Commonplace?

 

[Thavoice]

A good rule. Only managers should be able to

 

[KniteFlyer]

Assistant coaches are to be seen and not heard.