There are several law changes which fans will see for the first time at the Euros but the tweaks to the handball law are the most interesting.
The first concerns the element whereby it is an offence if a player touches the ball with his hand or arm when it has made their body unnaturally bigger.
The new directive, which we'll see in the Premier League next season, is that referees should use their judgment in determining the validity of the position of the hand or arm in relation to the player's movement in a specific situation.