However they're not decertifying at this stage, they're filing a disclaimer of interest which states that the NBPA no longer represents the players - quicker route than decertification where the union disbands. I'm not sure if the disclaimer has the same ramifications as decert as far as the NBA's view to void player contracts.
Quote from a league exec, who likes the move to file a disclaimer:
"When they went to 52% on the BRI, and the owners didn't blink, that should have told them right there, 'these owners are not going to give you what you want, how you want it.' It's (disclaimer of interest) a good move, but it came too late."