"They were perfectly in order, they were perfectly proper. We appealed, we kicked up a fuss, we called the Speaker but he ruled them out."
National's partners, Act and United Future, support the legislation but its other partner, the Maori Party, opposes it and drew criticism this week for voting with the Government on procedural amendments.
However, it is expected to vote against the bill at the third reading.
Although the third reading is time-limited and the Opposition will not be able to delay the legislation further, Mr Clayton said Labour would continue to fight the plan to sell up to 49 per cent of Mighty River, Genesis and Meridian, and coal miner Solid Energy.
Every time the Government sold shares in the companies, a process expected to begin with Mighty River within a few months, "this will be a weeping sore".
"The public will be reminded of what John Key and his government have done, and when they get their first power bill with price rises, that will be care of John Key."