The phrase "a common duty" is correct and usable in written English.
It can be used to refer to a responsibility or task that is shared among a group of people or within a community.
Example: "As citizens, it is our common duty to protect the environment for future generations."
Alternatives: "a shared responsibility" or "a collective obligation."
On Wednesday Beijing reiterated that China and Taiwan had a common duty to protect Chinese sovereignty in the South China Sea.
Similar casuistry enables Cicero to resolve in accordance with his thesis a range of common cases where advantage might be sought at the expense of justice (in administering the estate of an orphan, for example, a common duty of eminent Romans).
Rescripts, authoritative interpretations issued by the emperor in response to demands from disputants in both public and private cases, were a common duty of second- and third-century emperors.
Section 2 provides that the occupier extend a "common duty of care" to all lawful visitors, although it keeps the low duty of care towards unlawful visitors such as trespassers.
Their most common duty is building a cairn, a round pile of stones, which is the cheapest and simplest grave marker.
Just this week a judgment was handed down in the high court confirming the point: "the police and the CPS do not generally in the interests of the whole community owe individual members of the public… a common law duty of care in undertaking and performing their operational duties of investigating, detecting, suppressing and prosecuting crime".
Calling for a new "economic constitutional order," he declared it our common duty to "build toward the time when a major depression cannot occur again".
Nor is there a common law duty for investors (even ones who collectively control the Board) "to remove copyrighted content," in light of the DMCA.... these descriptions of how the Investor Defendants exercised control are the equivalent of "plain vanilla" characterizations of what directors ordinarily do... and are expected to do.
I think a set of books with interest in outside events – a coming world war, turmoil in India, social unrest and common duty – might be the right thing.
It is our common duty to seek out the answers to the resource dilemma and put them into practice.
