The NBA and National Basketball Players Association are struggling to reach an agreement on lowering the league's minimum age to 18.

The NBA is attempting to attach two conditions: requiring player-agents furnish all teams with medical information on draft prospects and also mandating players' attendance and some level of participation in the pre-draft combine.

The NBA hopes to have a deal with the NBPA to remove the one-and-done rule in time for the 2022 NBA Draft.

The league and union must collectively bargain any changes to a CBA that was ratified in 2016.