In 1979, the NBA signed four players from the newly renamed CBA. The CBA, receiving no compensation from the NBA for these signings, filed a lawsuit against the NBA. The suit was settled and in exchange for the right to sign any player at any time, the NBA paid the CBA $115,000; it also paid the CBA $80,000 to help develop NBA referees at CBA games. NBA/CBA relations grew tense again in 1982, when the CBA added the Detroit Spirits franchise to their league roster. Since the Spirits played in the same city as the NBA's Pistons, the NBA did not renew its year-to-year agreement with the CBA. The CBA then began binding individual NBA teams to a form contract, permitting those teams to sign CBA players to 10-day contracts. Under the 10-day-contract rule, a player was signed at the "pro rata" league minimum salary (as stipulated in the NBA's collective bargaining agreement) for 10 days. If the NBA team liked the player, the team could re-sign him to a second 10-day contract. After the second 10-day contract expired, the team had to either return the player to his CBA team or sign him for the balance of the NBA regular season. The CBA teams, in turn, would receive compensation for each 10-day contract.