The right is generally happy to devolve decisions about education or health care to the states, notes Charles Fried, a professor of law at Harvard and former solicitor-general, but not product-liability rules and other forms of business regulation.

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People should retain responsibility for their vehicles to ensure safety, but as cars become ever more automated, the current rules of liability would suppress innovation.

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Clive Garner says there are rules of strict liability in environmental cases like this.

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Now it is true that under the Target2 rules, the liability for losses on these balances is supposed to be shared between all eurozone central banks in proportion to their respective shareholdings in the European Central Bank.

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These rules will affect the tax liability of many people who go to work overseas for a time, or those who come to the UK for the first time.

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Yet state ethics rules prohibit lawyers from using the threat of criminal liability to obtain advantage in a civil settlement.

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Rules vary by state, but in all cases, understanding your liability is crucial because your financial safety is intertwined at a far deeper level.

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But, as is often the case in such difficult matters, Congress left the hard work to the regulators: The Environmental Protection Agency (EPA) was told to write rules describing exactly what steps developers had to take to gain this valuable liability protection.

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