Was heißt »Normalfall« auf Englisch?

Das Substantiv »Normalfall« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

An einen Tübbing werden sehr hohe Anforderungen bezüglich der Passgenauigkeit gestellt. Die Fehlertoleranz liegt im Normalfall im Bereich von einem bis zu wenigen Millimetern.: Very high demands are placed on the fitting accuracy of the tubing. The error tolerance is normally in the range of one to a few millimeters.
Hochwasser kann definiert werden als das Eindringen von Wasser in Gebiete oder Bereiche, die im Normalfall trocken sind.: A flood can be defined as the encroachment of water in an area or region which is usually dry.
Sommerliche Hitzewellen werden in Europa zum Normalfall.: Summer heatwaves are becoming the new normal across Europe.

There's one rule for them, and another for the rest of us.
As a rule, we get a lot of rain in autumn.
I've never quite understood that rule.
This rule isn't always applicable.
This rule is not always applicable.
This rule doesn't always apply.
It was never a hard and fast rule.
The Ko rule was introduced to prevent a game from being halted by repetitive moves which can go on indefinitely.
Ko is not just a restrictive rule of Go, but an extra emotion in each game.
In the game of Go, the rule of Ko (a term meaning eternity in Japanese) prevents repeating indefinitely between adjacent intersections, now the capture of a stone by a player, and then the capture of the capturing stone by the opponent.
You may not play a move that repeats a previous position on the board. This rule prevents players from endlessly capturing and recapturing a stone in either direction.
I make it a rule to study French for three hours every day.
Tom doesn't believe in blindly obeying every rule.
There was a script but, as a rule, Tom didn't stick to it, preferring instead to improvise.
I make it a rule not to work on weekends.
This rule doesn't apply to you.
I didn't know that rule.
She drinks coffee several times a day, as a rule.
His rule came to an end.
Tom used a slide rule to perform the calculation.