Exactly, and if a Standing Order were adopted to that effect and he did not do so, he would be deemed to have lost the confidence of Parliament. That concept is not completely new in constitutional law. England had such a rule about 500 years ago, when the king had to obtain Parliament's approval in order to prorogue it. It fell to the wayside, but history tends to repeat itself, and that could be the case here. It is time to make the use of political institutions more democratic.
On May 11th, 2010. See this statement in context.