Laws 9 & 10: The ball out of play, and the method of scoring

Law 9:

This one is an easy one. A ball is considered to have gone out of play if it completely crosses either the touchline or the byline. Players can go out of bounds if they wish while in position of the ball, but cannot let the ball cross the line. If the ball cross a touchline, the opposing side takes a throw-in. If the ball crosses the byline, a corner or goal kick is taken.


Law 10: The method of scoring

A ball is considered scored if it completely crosses the goal line and enters the goal. If any part of the ball is over the goal line, it is not considered a goal.

Over the last 5-10 years, professional soccer has experimented with goal line technology, which uses a chip inside of the ball to determine when the goal line has been crossed. This technology is not widely used in the sport yet.