In addition, as a ping-pong player, you may be called upon to umpire quite often in local competitions or leagues. As the umpire, it is your job to make sure that both players are playing within the rules, and to penalize them when they do not. How can you possibly hope to do a competent job of umpiring if you don't even know the rules in the first place?
In order to help you with getting to grips with the rules, I have written a Guide to the Most Important Ping-Pong Rules that Beginners Should Know.
But don't stop there. Once you have got your head around those important rules, it's time to fill in the rest of the blanks by taking a look through the rest of the Laws of Table Tennis, which I have categorized below for your convenience.