Tauranga-based list MP Clayton Mitchell is calling for fuel giant Mobil to be prosecuted for the harbour oil spill.
Mr Mitchell, of New Zealand First, also wants the Port of Tauranga to take action, "as it is clear Mobil's pipelines and measuring equipment are not up to standard".
"New Zealand First wants an answer from Transport Minister Simon Bridges about what he is doing to make sure no more spills occur," said Mr Mitchell.
Mr Bridges said the Government implemented a robust regime when it came to dealing with oil spills.
"I'm very satisfied the regime is a good one and doesn't need changing. That being said, lessons can be learned in the investigations that come after the clean-up."