Opponents fear a spill would be a disaster, being difficult to clean up in icy seas.
However, as well as being difficult to enforce, the proposal faces resistance from the industry.
For the man who has built a career on being difficult to define, the defining moment still lies ahead.
They may also just be difficult for the sake of being difficult.
These qualities, though, are offset by arbitrary spelling, and, besides, there are other languages, such as Russian, that have spread despite being difficult to master.
By abandoning this principle, standards would slip, he suggested, since private sector providers of auditing services would "not want to get a reputation for being difficult".
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For his entry in the 2012 edition of Who's Who, the director listed his interests as "eating, being difficult, making table mats, washing silk shirts" and "doing Pilates badly".
While a lot of attention has been paid on wireless networking in recent months--Apple Airport and Lucent Technologies ' (nyse: LU - news - people) Orinoco products come to mind--some of the products have been criticized for being difficult for the average home users to set up.
Both factors contribute to the Wagner tuba's reputation for being fiendishly difficult to play in tune.
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For apparently they need a simple explanation the subject being too difficult for them.
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It can be expensive and slow to grow, as the language has the reputation of being very difficult to learn.
For instance, the issue whether additional stimulus spending that is presented as temporary may end up being politically difficult to prevent from becoming permanent.
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Aside from being a difficult disease to treat, scant data from its failed trail with the drug Rituxan leave investors with little guidance going forward.
Being very difficult to sell 100% of ads to brand advertisers, we split the total ad impressions between performance (long tail advertisers) and premium ads (brand advertisers).
But with the last couple years being so difficult for jobs, why are budget cuts to programs that are helping these people keep their heads above water?
"Doubling the complexity of the circuit often times turns it from being a difficult task to a practically impossible one, whereas for us to double the complexity it's really straightforward, " he told BBC News.
Greene, who is in a tight race for the Democratic senatorial nomination in Florida with Rep. Kendrick Meek, was already facing something of an image problem as a recent arrival to the state whose former employees have accused him of being a difficult boss.
The suspect was being stubborn and difficult to talk to, said Didier Martinez, a Toulouse police press officer.
So how can you avoid being labeled a difficult patient, possibly by a doctor who's just impatient and stressed out?
Mario Gomez's strike gave Bayern its 10th straight win, despite being given a difficult afternoon by the relegation threatened side.
Verheijen admits it is more difficult being a consultant but still firmly believes his methods are better than those employed by most coaches.
Preventing stolen electronics from being sold is difficult, the companies say.
Legal scholar Danielle Citron, for one, has written extensively about the Internet being a more difficult place for women than men when it comes to cyberharassment.
This latter commandment being the most difficult one to follow.
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Clearly, Mrs Albright's seeds are being planted in difficult soil.
But although it is just possible that Mr Darling will see the reforms through, Mr Field's angry resignation suggests that radical reform has been abandoned for being too politically difficult.
After reaching her thirties, she suffered a medical event that pretty much pushed over the wall from being strange, difficult and disagreeable to strange and sometimes rapid mood swings and a highly volitile dangerous personality.
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To be sure, there are difficult problems being faced by our friends across the pond.
Being patient with a difficult person is a challenge no matter who it is.
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Mrs Gillan said, in an interview with BBC political correspondent Carole Walker, that the lifestyle of being an MP was difficult for women.
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