Soccer referee is a paid job, like most jobs, becoming a soccer referee requires the individual to go through some trainings and get certified regardless of your county, city, region, state and even country. Each country has her own Football body and referee associations that oversee this processes. In this post I'm going to share some general rules and requirements that will gurantee you success in becoming a referee in your local league and possible international competitions. First of I have to acknowledge the soccer referees in the world, you guys makes the game more fun to watch. Being a referee should be a decision you make out of love for the game. Anything worth doing is worth doing well if you put your heart to it. Referees are most times on the run during a match so that they can have a clear view of the action, this means that an intending referee should be able to run at a certain minimum pace and duration of the game. Refereeing job is more like a promotion/ranking type of job, you have to start from the very bottom and walk your way to the very top. In order to get accepted into the bottom level you will need some qualifications. See it like you are applying to college, you must first prove that you passed through some classes and graduated with the minimum grade. But in a refereeing job the minimum requirement to get into the bottom level of the ranking is your zeal/passion to want to be a referee, your desire. After you've accessed yourself and you are convinced that the passion is there, the next step is to contact the football(soccer) refereering body or association in your state/country(depends on where you come from). These bodies will walk you through the steps, rules and disciplines of becoming a referee. Please note that the method of training in this stage might be different from each state/country. When the association/body is convinced that you've passed the test/exam you will be assigned a referee badge and you will be asked to buy your referee gears. You start off by officiating less competitive games, an eye will still be on you. Your job here determines when you will move up the ranking ladder. Please note that you will have to study the rule of the game(soccer) from start to end, line by line. I hope this little message gives a clue that will guide you in your path of becoming a soccere referee. Please do share any question you have, we will be glad to answer you.
SOURCE: http://www.soccereye.com/2017/06/how-to-become-soccer-referee.html?m=1

Thanks for enlightenment,How many referees are in a League?