The NBA will mandate a league wide contact tracing program requiring players and many team staffers to wear sensor devices during all team-organized activities outside of games beginning on January 7th.

Not wearing the sensors is subject to discipline, but it's unclear what the discipline might be.

A testing period for the program began Dec. 23 and is expected to be implemented Jan. 7.

The sensors do not record GPS location and will activate when coming within six feet to another person wearing one.

The memo states that the sensors will record "the distance and duration of in-person interactions" with others who are wearing a sensor, which the NBA believes will aid in its contact tracing reviews in instances of positive coronavirus cases.