The NBA is adding two new rules for the 2019-20 season.

Most exciting and important is the implementation of a coach’s challenge. Coaches will be allowed one challenge per game, as long as they have an available timeout. The team must call a timeout immediately following the play, and then signal for a review.

Reviews are available for a variety of calls, including a foul called against the team issuing the challenge. They can also be used to question out-of-bounds calls and goaltending, among other things.

Even if the challenge results in the play being overturned, coaches will only have one challenge to use.

The coach’s challenge has been used in the G League for the last two years, as well as in this season’s Summer League.

Also new for 2019-20 is the league’s replay center being able to initiate a replay review. Deciding when to review a play - such as whether or not a shot is a three-pointer - will no longer fall squarely on the shoulders of the referees. This should help the refs catch more close calls.

Here’s the official release from the league, which received unanimous approval from the 30 teams.

The official word on NBA rules changes for next season: pic.twitter.com/FI1t1glfXt — Tim Reynolds (@ByTimReynolds) July 10, 2019

The most exciting news is that coaches must challenge the call by twirling their finger in the same manner that refs due when signaling for a replay.

That brings up a very important question . . . which coach are you most interested in seeing wiggle their finger while angry at the refs?