"We believe NZ needs an insurance policy against that risk, and that buying the refinery is cheap insurance. NZ produces oil. If refined here, we believe it could give NZ fuel security for essential services, and the money to purchase the refinery shares would be small next to approximately $60 billion created by the Reserve Bank in the last two years."
The petitions committee requested the party put in a submission to support its petition.
"The ongoing actual and likely economic costs of closure of the refinery will be borne by the Government, fuel users and individuals - which ultimately means all New Zealanders will pay," Leitch said in his submission.
He said the environmental clean-up costs of the refinery site once Refining NZ stopped the operation was estimated to be about $300 million.
No plan has been published for this work, but the costs would undoubtedly be passed on to fuel users through the cost of fuel at the pumps, he said.
"The Reserve Bank has already created around $60 billion in the last 18 months and the $260-$300 million needed to purchase the refinery shares would be a drop in
the bucket."
The other option, he suggested, is that the Government follows Australia's lead and subsidises the refinery's operation with a levy on fuel users.
"While we need to transition away from reliance on fossil fuels, having the refinery in operation will allow blending of bio-fuels, fuels from carbon capture,
plastic and other options as they come on stream.
"It could also participate in developing production and supply of those new fuels, particularly Sustainable Aviation Fuel. Without it, all those options become much more difficult and very expensive as the infrastructure, already in existence at Marsden Point,
will have to be constructed from scratch," Leitch said.
■ Refining NZ's board has confirmed the change in operations of the site, meaning the refinery will transition to an import-only fuel terminal from April.
The refinery's shareholders voted overwhelmingly in August for the change - with the new entity known as Channel Infrastructure - to go ahead due to what it said was a glut of fuel supplies globally, combined with the impact of Covid-19 on refinery output, pipeline fees and plummeting demand for fuel.
The number of workers at the site is expected to drop from 300 to 60, with hundreds of contracting jobs and services from associated businesses in wider Northland also likely to be cut.