Team switching

iam so lost about the team switching rule and i need someone to give me clear view about that rule
when is it allowed to switch for assets ? Before/After 2:00 . . .
are u allowed to switch to play assets with teammate if you joined the match late ?
if there is assets in both sides can you switch 
and if you get auto switched are u allowed to switch back ? 
and thanks for your patience . . .
 

Im posting same as in Discord. for future players who ask about this.
This is not personal btw. I only  use you as example.


Dont switch for ASSEST at all.