But it is only convention, not law, that they bow to the Commons in such circumstances, so there is at least a theoretical possibility that they might battle on.
Behind him, another from the US, all interested in what Rupert and James Murdoch, then Rebekah Brooks will - or will not - say and what the UK's top policemen until a few days and hours ago will want to spell out as they bow out.
They wear bow ties and chat about the weather and would never even think of kicking a puppy.
In schools the heads I encountered seemed to have given up the struggle and simply wanted to keep things running until they could bow out.
BBC: We invited your responses to a feature on supply teachers.
Many baby-boomers say they never want to bow out altogether, though they would often prefer to put in shorter hours.
They might also bow to union pressure to block Walmart from entering the local market, flouting polls showing that two-thirds of the city want the retailer's low prices.
They should voluntarily bow out early, to start another business.
Otuam residents usually address her as "Nana" -- an honorary title given to royalty but also to women with grandchildren -- and bow when they see her.
The Russian authorities have said they will try to recover the bow next year.
They were all bailed to appear at Bow Street Magistrates Court on Monday.
They were topped with a large centre bow edged with red glass bugle beads, crystals and three emerald shaped crystals.
Earlier this year they opened The General (restaurant), Bow (Bar) and Finale (Club) inside the same space the same space on the Bowery at Spring Street.
They have all been bailed and will next appear at Bow Street magistrates court in London on 21 May.
I'm willing to bet they won't turn down your offers, even if they're not wrapped up and tied with a bow.
If Israel is convinced that it has no choice but to bow to these people's demands, they will not be appeased.
They are finished off with a tie, cravat or bow tie -- and the obligatory pocket square protruding from their immaculately tailored jackets.
CNN: Dedicated followers of fashion: Congo's designer dandies
The group, who announced last October they were splitting after 14 years, are set to bow out with a final concert at Dublin's Croke Park on 23 June.
They are expected to be charged tomorrow and to appear before Bow Street magistrates.
Of course it was disappointing to bow out in rain-affected circumstances, but they had merely been clinging on by their fingernails - rescued time and again by the bowlers.
Call it the Das Boot effect: With their deep keels and heavy ballast, J-boats push such a mass of water that they tend to hunker down in a breeze, submerging the bow and stern and soaking practically everyone on deck.
That said, I have spoken to big investors, who tell me that they were generally impressed with his performance before he was forced to bow out - and would be happy to have him back, so long as he works in a way that doesn't burn himself out.
Knowing that the magical world they've enjoyed for well over a decade will be taking a bow from the big screen can be stressful and sad for fans.
Then, at four o'clock in the afternoon, twenty-four hours after the mortar fell on his friends and neighbors while they waited to buy bread, he will bend down and pick up his bow.
The only hope for Texas is that once the handsome profits from this album have been banked, they decide to throw caution to the wind and make a record that does not bow to the expectations of the masses and instead exaggerates the potential that lurks beneath the surface.
If they are right, Monday's plunge may have been the first shot across the proverbial bow, with others to follow.
Officials in Bow Mar say the construction and design of the berm comply with town guidelines and that they're not obliged to protect the views of people outside the town's boundaries.
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