WG1 Modified gravity
Leader: Salvatore Capozziello (Italy)
CoLeader: Prado Martín Moruno (Spain)

WG2: Relativistic effects
Leader: David Mota (Italy)
CoLeader: MariaFelicia De Laurentis (Spain)

WG3: Observational discriminators
Leader: Alessandra Silvestri (Netherlands)
CoLeader: Vincenzo Salzano (Poland)