Symbol Tiles (Article ID 101)

Abstract:  Symbol tiles also referred to as natural tiles are all tiles except for Flowers and Jokers.  Question from a player:  What is a symbol tile?   Answer from the NMJL:  Symbol Tile, “(Also referred to as a Natural tile) –

Joker Exchanges Are Optional (Article ID 62)

There is no requirement to do a Joker exchange if you have a tile that would allow you to do so. In some cases, a player may choose not to do a Joker exchange if they want to prevent another player from being jokerless or to go for a jokerless hand.