Section 5: Rules of Play

Law 5.1: A match consists of two halves of 40 minutes of playing time each. The half-time interval must not exceed 15 minutes.

Source: Section 7, Section 8, Law 5, Law 5.1, Law 5.4, Law 5.7, Law 13, Law 13.1, Law 13.2, Law 13.4, Law 7, Law 7.1, Law 12, Law 11, Law 11.1, Law 11.3, Law 11.5, Law 12.1, Law 12.2, Law 12.3

Send this to your friend — argument over.