Question: I was invited into a group that says they play a 14 tile game. Is this an approved version with the National Mah Jongg League and will they answer questions that arise during this style play?

Answer: the National Mah Jongg League does not sanctioned 14 tile play. With this version you are discarding and then picking which is basically picking prior to your turn and looking at your next tile in advance.

Source: Mah Jongg Made Easy (2020 page 18 #2)