It added that allowing smoking on set could "signal a green light for much more widespread use of smoking in productions".
But Wales' smoking ban - introduced in 2007 - does not allow smoking on set.
Smoking is set to be banned in workplaces from summer 2007, with the exception of pubs which do not serve food.
It was to be used to enforce penalties in the legislation against tobacco companies that did not succeed in reducing teen smoking to levels set in the legislation.
In 1998, the government set 2010 as the target for 12% smoking prevalence (available here).
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It also encourages countries to set cigarette taxes at a level that will discourage smoking.
However, with the exception of offering premium discounts for those who engage in a limited set of less risky behaviors (such as not smoking), premiums after 2014 no longer reflect individual medical risk factors.
It has set a "national ambition" in England to get smoking rates down to 18.5% by 2015 with ministers talking about the need to "denormalise" it.
He said if cannabis cafes were set up in Britain up to 25% would switch to smoking the drug rather than drinking alcohol, leading to less drunken behaviour and violence.
The government-backed smoking "quitline" has received more than 30, 000 calls since it was set up 18 months ago, said the taoiseach.
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Programs were set up to address the three factors, the most successful of which dealt with smoking.
This risk can only be calculated using a set of specially devised tables, taking into account all the possible risk factors, such as smoking, family history, and cholesterol levels.
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