The decision extends the threat of disruptions to iron ore shipments at the world’s largest bulk export terminal.

The Australian Institute of Marine and Power Engineers (AIMPE) has reportedly not approved an enterprise agreement put forward by Teekay Shipping (Australia) Pty.

Last week an eleventh-hour intervention by Australia’s Fair Work Commission saw the strike over pay and conditions put on hold.

Masters and deckhands manning tugs at Port Hedland had earlier voted to accept a new pay deal after 15 months of negotiations.

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