FIFA Laws of the Game

Laws of the Game website

Laws of the Game 2019/20 PDF document

US Youth Soccer Rules of the Game

US Youth Soccer Rules of the Game

Please note:  This link also lists the game lengths for each age group:

Age Group Game Length   Size Number of Players
17U, 18U & 19U Two 45' halves   #5 Full-sided
15U &16U Two 40' halves   #5 Full-sided
13U &14U Two 35' halves   #5 Full-sided
11U &12U Two 30' halves   #4 9v9; goalkeepers
9U & 10U Two 25' halves #4 7v7; goalkeepers