cooling break

As I am totally and utterly in the World Cup mood, following all the news about the players and the teams, I will probably introduce expressions related to the sporting business more and more until the 12th July. So today - a cooling break - after the Netherlands - Mexico game. What are the regulations behind this break? How long is it? See the FIFA website for all the details:

http://www.fifa.com/worldcup/news/y=2014/m=6/news=keeping-the-players-cool-at-brazil-2014-2369525.html