PROPER PLACEMENT OF TILES WHILE PLAYING (Article 168)

Commentary: Except when rearranging the hand, players must always keep at least thirteen tiles on the rack. The league does not include a penalty if a player does not follow this rule. However, another rule states that they risk disqualification if a player has too few tiles on their rack (e.g., in the sloped or flat part of their rack).

During the Charleston, it’s acceptable for a player to hold tiles in their hands or place tiles on their cards while deciding what to pass. After the Charleston, all tiles must be in the slanted or flat part of the rack.

During the pick and discard phase of the game, a player may pick with one hand and discard with the other while their picked tile is still in their hand (e.g., double-fisted player). This is a disqualifiable offense because the player only has twelve tiles in hand.

When players claim a discard to make an exposure, they often face the tiles outward for their opponents to see. However, this is both awkward and unnecessary. Instead, the tiles should be placed on the rack facing inward, allowing the player to view them easily—after all, it’s their hand!

Question from a Player: If a player has tiles on their card when playing a hand, can another player call their hand dead? 

Answer from the NMJL: Thirteen tiles must be either in or on your rack at all times. This includes the exposed part of the hand. 

Source:   Mah Jongg Made Easy (2024 page 16 #1 and page 17 7[a] )