Adam Silver’s ambitious addition to the NBA schedule now has an official set of rules. And it looks just like the international soccer model. The In-Season Tournament was introduced in the new Collective Bargaining Agreement, which was officially signed Wednesday and released to the masses. The tournament, or ‘The IST’ as it’s nicknamed in the CBA, will feature all 30 teams and take place on two designated days per week during the first two months of the regular season.