 Complete the following phrase:  The current eligibility rules were established under the NBAs collective bargaining agreement CBA, which expired in , resulting in a lockout. The previous CBA, approved in December 2011, made no changes to the draft rules, but called for the NBA and its players union to form a committee to discuss draft-related issues. In 2016, the NBA and NBA Players Association met to work on a new CBA, which both sides approved in December of that year. This most recent agreement started with the 201718 season and will run through 202324, with a mutual opt-out after 202223. The basic rules that started in the 