Definition of «to know the rules»

"To know the rules" means to be familiar with the guidelines or instructions that govern a particular activity or situation

No one can claim they did not know the rules of conduct. (elearningindustry.com)
With so much at stake it's good to know the rules in which you are governed by. (dmv.org)
That's because it still doesn't know the rules of the game. (sciencenewsforstudents.org)
(see all sentences)