Greens MP and workplace relations spokesperson Adam Bandt has warned that any attempt to revive WorkChoices by Tony Abbott could fail in the Senate.
Mr Bandt said if the Coalition was able to win government, any moves to legislate for individual contracts would be opposed by the Greens, who may still hold the balance of power.
"We will oppose any attempt to return to WorkChoices", Mr Bandt said.
"The only way Mr Abbott could revive Work Choices will be if Labor is willing to back it. We will not."