For a commission overseeing New York Harbor’s ports, it is a fight over bringing diversity to dockworker jobs that are predominantly handed to white men — some connected to union leadership.

But for labour and port employers groups, it is about a government body that has reached well beyond its mandate, interfering in the hiring practices on the docks.

The New York Shipping Association (NYSA), which includes several shipowners and liner operators, has teamed up with the longshoreman union that it hires in New York and New Jersey in a legal battle against an interstate regulator set up in the 1950s to fight crime and corruption at the ports.

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