MYSA has specific game lengths for each division. See the MYSA Game Day Responsibilities documents above. The chart below is what is recommended by U.S. Soccer.
Section 1. (a) Except as provided by US Youth Soccer and its State Associations, the length of games, overtime periods, and ball size for each age group is as follows:
(b) In tournament play, if the game is still tied after overtime periods, FIFA "Kicks from the Penalty Mark" rules apply to determine the winner.