Before revision:  Finally, the preferred arm is broadcast in a decentralized fashion to other agents through {\em pure exploitation} in (N-1)K rounds with N agents and K arms.
After revision:  higher ranked agents, and play only from the non-dominated arms according to the UCB. At the end of the phase, agents broadcast in a decentralized fashion to other agents through {\em pure exploitation} in (N-1)K rounds with N agents and K arms.