Pressure is mounting on the Government to fully scrap a provision entrenching parts of its Three Waters legislation.

Constitutional experts say the provision, requiring 60-percent of MPs to change part of the law, would pave the way for governments to entrench other laws.

Cabinet has agreed to refer the matter back to Parliament's cross-party Business Committee.

But National's Michael Woodhouse told Mike Hosking that doesn't actually fix the situation.

“It can’t be fixed by the Business Committee, Labour have to agree to a motion to have that Bill sent back to that part of the Bill process, take those clauses out.”

The Government was advised a year ago not to entrench the policy.

LISTEN ABOVE