The Maritime Union has a "seriously arguable case'' against the Ports of Auckland's decision to contract out union members' work, the Employment Court says in a written decision.
Judge Barry Travis on Tuesday granted an injunction against the company's plans until mid-May, but reserved his reasons until today.
In his written decision, Judge Travis said there was a "seriously arguable case'' that the company's decision to contract out union members' work would seriously undermine bargaining on a new collective agreement, while bargaining was still underway.
"It will also, arguably, undermine the bargaining in the future.''
Judge Travis said it was arguable that would be in breach of the Employment Relations Act.