Napier Port's board has approving the business case to invest in the development of a new $170m wharf known as 6 Wharf.
This will be subject to funding confirmation.
The port's approval of the business case is a condition set by the Hawke's Bay Regional Council, prior to a final decision on whether to approve a minority initial public offer (IPO) of shares in the port.
The business case approved by the Napier Port Board includes an updated estimate of the projected investment required of approximately $170-$190 million.
Regional Council chairman Rex Graham said the port had tested the 6 Wharf business case against detailed trade and revenue forecasts, design and engineering standards and resource consent requirements.