The league system in Striker Manager 3 works in the same way as most real leagues.
Every season you will play two times every team in your group and once the season finishes the first three will get promoted to the next division and the 4th will go to a play off against all the other 4ths of the other groups of your division.
Win= 3 points
Draw= 1 point
Loss= 0 points
The difference between goals scored and goals received is taken into account then.
If it continues to be the same the goals scored are taken into account.
If it continues to be the same, the game will choose a random winner.