linguistic:paraphrasing, structural:scholar_edition, structural:expansion
Duplicate

The official rules of duplicate bridge are promulgated by the WBF as "The Laws of Duplicate Bridge 2017". The Laws Committee of the WBF, composed of world experts, updates the Laws every 10 years; it also issues a Laws Commentary advising on interpretations it has rendered.

In addition to the basic rules of play, there are many additional rules covering playing conditions and the rectification of irregularities, which are primarily for use by tournament directors who act as referees and have overall control of procedures during competitions. But various details of procedure are left to the discretion of the zonal bridge organisation for tournaments under their aegis and some (for example, the choice of movement) to the sponsoring organisation (for example, the club).

Some zonal organisations of the WBF also publish editions of the Laws. For example, the American Contract Bridge League (ACBL) publishes the Laws of Duplicate Bridge and additional documentation for club and tournament directors.