Law 18 The latest fashion t-shirts and polo shirts with a referee twist.... All Referees’ know that there are ‘18’ Laws in football. The 17 set out by FIFA and then probably the most important of them all LAW 18 - Commonsense! We have taken the instantly recognisable [to all referees] ‘Law 18’ and created a range of quality and fashionable casual tops. I guess Law 18 is a bit like having Official Sports as your referee kit supplier. Commonsense!