"rightful conduct" is a correct and usable phrase in written English.
You can use it in any context to indicate appropriate behaviors or actions that are considered fair and sensible. For example: "She carried out her duties with rightful conduct, making sure to treat everyone with respect."
It involves regarding the object as making a rightful claim on our conduct, as deserving moral consideration in its own right, independently of considerations of personal well being.
My family discriminated against me and denied me my rightful property rights.
Dewey wrote, "the central problem of philosophy is the relation that exists between the beliefs about the nature of things due to natural science to beliefs about values – using that word to designate whatever is taken to have rightful authority in the direction of conduct".
And even as the wood chips were flying, the two beekeeping groups squabbled over how the rescue should be conducted and who the rightful owner of the bees was.
The Cabinet would enjoy great independence, the staff would be subordinate, and the Congress would be restored to its rightful place as a co-equal branch in the conduct of foreign affairs.
"We seek independent arbitration because it is clearly a much more appropriate way to conduct discussions - keeping any debate away from the public arena and through a rightful independent process.
In a contemporary book, a monk wrote: Initially Ivan Alexander, who was still nominally the rightful ruler of Vidin, did not take active measures for its recovery, although his refusal to give safe conduct to the Byzantine emperor John V Palaiologos who was returning to Constantinople from Western Europe was explained by the deterioration of the Bulgarian–Hungarian relations.
Malcolm becomes the rightful king.
Rightful monarch or child-killer?
A — Its rightful heritage.
