That changed with the most recent group of exemptions that went into effect October 28, but the switch included a 90-day grace period that ends Saturday, as TechNewsDaily pointed out.

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The accounting switch and the confusion surrounding it has had more of an effect on ACCL's stock price than anything else.

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"The overall effect is not going to be turning a light switch off" and banishing the entire US to darkness come the stroke of midnight, says Memo Diriker, director of the European-American Business Institute at Salisbury University.

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Pump the subway station full of molecules that switch off the receptors that pick up nasty odors, and you can, in effect, neutralize an assault on your nose.

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