Act of parliament. References to statutes cite a date and a chapter number. The year is the regnal year of the session in which the statute was given royal assent. If there were 2 sessions within the same regnal year, the statutes are distinguished as belonging to statute I (st. I) and statute 2 (st. 2). If a session covers two regnal years then its statutes are cited as belonging to both (e.g. 2 & 3 Edward VI). Each statute has a chapter number but the order is not strictly chronological.