established rule

See: law, principle
References in classic literature ?
The young second officer hesitated to break the established rule of every ship's discipline; but at last could not resist the temptation of getting hold of some other human being, and spoke to the man at the wheel.
This abrupt entrance was such an infringement on the established rules of the household of Cornelius van Baerle, that the latter, at the sight of Craeke, almost convulsively moved his hand which covered the bulbs, so that two of them fell on the floor, one of them rolling under a small table, and the other into the fireplace.
The long gamekeeper resolutely protested against the introduction into a shooting party, of a gentleman in a barrow, as a gross violation of all established rules and precedents.
He said these were individual incidents and not an established rule and added that the license plates were in keeping with international standards.
SUKKUR, March 19, 2012 (Frontier Star): Chairman Senate Nayyer Hussain Bukhari has said that the government has successfully met enormous challenges, established rule of law and assured supremacy of the Parliament.
Argentina, which has claimed the South Atlantic islands since Britain established rule in the 19th century, invaded in 1982.
It's an established rule of war that victory most often goes to the side that has surprise in its favor.
According to the Ombudsman, grave misconduct is an administrative offense of transgression of some established and definite rule of action, more particularly unlawful behavior or gross negligence by a public officer, attended with the elements of corruption, clear intent to violate the law or flagrant disregard of established rule.
But the judges stated: "In business transactions, particularly, the certainty of settled rules is often more important than whether the established rule is better than another or even whether it is the 'correct' rule.
A public officer shall be liable for grave misconduct only when the elements of corruption, clear intent to violate the law or flagrant disregard of established rule are manifest,' Justice Noel G.
Judge Cardamone also wrote, "Enforcement of an owner's common law right to obtain possession of its premises upon the tenant's non-payment of rent may not override an established rule of international law.
The acts by which they were arrested, as per their complaints, failed to show a clear intent to violate the law or a flagrant disregard of established rules.