Everybody, leader and sideman, or their estates, has to get paid. Zev has boasted in the past that he makes sure of this. He even thanked everyone in the booklet and dedicated the releases to those who were deceased. Everyone has to OK the release as well. He is less rigorous about that now. Neither Charles brother gets a dedication here.
Good point about big bands. Uptown did not get approval for the Duke Pearson big band Left Bank date from most of the band members or estates. Jerry Dodgion did help out, but Lew Tabackin was complaining on Facebook about it. In fact, he did not know it was being recorded. The Left Bank guys told me they always got permission from the leaders but I am skeptical. In fact, Uptown needed clearance from Blue Note since Duke was signed to them. I am sorry I hooked them up, other Left Bank tapes (more Pearson, Grant Green) are now AWL.