(see related story) Rome, April 9 - Italy's centre left on Tuesday blasted the 5-Star Movement's threat to occupy the Lower House in protest at the failure to set up the new parliamentary commissions. "The threat to occupy the floor of the House is undemocratic," said Luigi Zanda, the Senate whip for the centre-left Democratic Party. Zanda was speaking after a meeting of Upper House whips in which a "big majority" decided that the new commissions could not be launched until Italy has a government to replace outgoing Premier Mario Monti's technocrat administration. A meeting of House whips decided the same. In addition to threatening to occupy the House until a minute after midnight following Tuesday's debates, the 5-Star Movement (M5S) has also asked its supporters to stage a protest in the square outside the building. The M5S has said that on Thursday it will put measures it considers to be crucial to a sort of 'shadow commission'.