Give some stream of consciousness and then the answer. The three-second rule was introduced in 1936 and was expressed as such: no offensive player with the ball could remain in the Key with or without the ball, for more than three seconds.

Based on this passage, when did the nba 3 second rule start?
The relevant sentence in the passage is: The three-second rule was introduced in 1936 and was expressed as such: no offensive player with the ball could remain in the Key with or without the ball, for more than three seconds.
Therefore, the answer is 1936.