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.
They knew, these excellent old persons, that, by all established rule -- and, as regarded some of them, weighed by their own lack of efficiency for business -- they ought to have given place to younger men, more orthodox in politics, and altogether fitter than themselves to serve our common Uncle.
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.
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.
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.
We believe democratic institutions are strengthened when established rules are adhered to with consistency," said Bernadette Meehan in a statement released by the White House.
Saying that the appointment of Alhaji Aminu Abubakar was not in line with the established rules of the association, the Court announced Chief Lawson Obasi as the substantive National president of IPMAN.