Mr Higgins said they could stop the fight, and go to court, but he thinks Joe will KO him. He DID say it was in the contract.
https://www.stuff.co.nz/sport/other-sports/96940287/joseph-parker-can-eliminate-british-referee-trainer-kevin-barry-says
https://www.stuff.co.nz/sport/other-sports/96940287/joseph-parker-can-eliminate-british-referee-trainer-kevin-barry-says