The NBA notified teams this week that they must certify and submit the precise height and age for every player within the first week of training camp, league sources told the New York Times' Marc Stein.
Height will now be measured with a player's shoes off, according to Stein.
For decades, true heights have been a subject of debate. Basketball teams at both the pro and college level have long been accused of inflating measurements, although the most notable current example is Kevin Durant being listed shorter than his true height.
The Brooklyn Nets - like the Golden State Warriors and Oklahoma City Thunder before them - list Durant at 6-foot-9. The 10-time All-Star admitted in 2016 that he is actually 6-foot-10 barefoot and 7-feet in shoes.
However, the impetus for the new guidelines was actually player age, according to Stein. Last season, Sacramento Kings guard Buddy Hield clarified that he was one year older than previously listed. He blamed the error on Wikipedia.
