Questions about the recent changes in the Laws of Bridge? In the list of documents below, each Law is broken down individually, highlighting the differences between the 2007 and 2017 versions. You will also find a series of videos—where our top Tournament Directors evaluate the most important changes—and a list of additional resources.



Subject Law Watch
Claims and Concessions Law 68 and 70 YouTube
Comparable Call Law 23 YouTube
Comparable Calls – Similar Meaning Law 23A1 YouTube
Comparable Calls – Subsets Law 23A2 YouTube
Comparable Calls – Same Purpose Law 23A3 YouTube
Pass out of Rotation Law 30 YouTube
Bid out of Rotation Law 31 YouTube

Subject Law Watch
Double or Redouble out of Rotation Law 32 YouTube
Awarding an adjusted score Law 12C YouTube
Lead restrictions after a withdrawn call Law 26 YouTube
Wrong Board Law 15 YouTube
Legal and Illegal Changes of Call Law 25 YouTube
Mistaken Explanation – Mistaken Call Law 75 YouTube
Laws Dealing with the Revoke Laws 61-64 YouTube


ACBL Seminar (video)

An edited version of this seminar has been created as two separate video files, each lasting approximately one hour. Viewing both videos completely and sequentially will provide a thorough review of the most important changes to the Laws of Duplicate Bridge that became effective in September 2017.

The index below will allow the viewer to identify the elapsed time location in the videos of various topics of interest. The index will also facilitate returning to where one stopped when it was not convenient to view the entire video at one sitting.

Part One

  • 0:00 Introduction and Overview
  • 2:37 Law 68 – Claims and Concessions
  • 11:45 Law 23A1 – Definition of Comparable Call – Same or Similar Meaning
  • 32:08 Law 23A2 – Definition of Comparable Call – Subset
  • 39:37 Law 23A3 – Definition of Comparable Call – Same Purpose
  • 43:25 Law 23 – Directorial Procedure in Handling Comparable Call Situations


Part Two

  • 0:00 Information about Club Director Support by Telephone
  • 4:20 Law 23C – Comparable Call – Damage to the Non-Offending Side
  • 6:18 Law 30 – Pass Out of Rotation
  • 16:30 Laws 31 and 32 – Bids Out of Rotation; Doubles Out of Rotation
  • 23:12 Law 27 – Insufficient Bids
  • 29:06 Law 26 – Call Withdrawn, Lead Restrictions
  • 37:00 Law 25 – Legal and Illegal Changes of Call
  • 44:05 Law 12C – Awarding an Adjusted Score
  • 58:11 Law 64 – Procedure after an Established Revoke


Other Resources