Opposition parties are labelling the select committee process to consider the Marine and Coastal Area Bill a farce.
The legislation has been reported back to the House with no amendments.
If passed, the bill would allow Maori to gain customary title of the foreshore and seabed - but only if they can meet a tough test proving they have had exclusive use and occupation of the relevant areas since 1840.
Labour Party leader Phil Goff says the Government is trying to push replacement legislation for the Foreshore and Seabed Act 2004 through the House before the Maori Party implodes.
The party says Government members on the committee blocked any legal advice being obtained on the effect of the changes to the threshold test.
Mr Goff says the process has been an absolute disgrace and hundreds of submitters who sought changes to the bill have been ignored.
He believes the legislation will not provide an enduring solution.
The Green Party agrees, saying the revised legislation repeats the injustices of the original act, and does nothing more than paper over the cracks
ACT leader Rodney Hide says his party was taken by surprise by the sudden rush in the process in the past days, and he can only assume the rush is because of recent problems within the Maori Party.
The Maori Party's disputes and disciplinary committees met on Wednesday to consider a complaint laid against Te Tai Tokerau MP Hone Harawira by party whip Te Ururoa Flavell.
Mr Harawira has criticised his party's support for the National Government and has been suspended from caucus.
Attorney-General Chris Finlayson says the bill has had plenty of parliamentary scrutiny, with work starting on it in November 2008.
He says the criticism is just political rhetoric and now Parliament must debate the bill on principle before it becomes law.
