The phrase "arrival of authorities" is correct and usable in written English.
It can be used in contexts where you are referring to the moment when officials or law enforcement personnel arrive at a location, often in response to an incident or situation.
Example: "The arrival of authorities was met with a mix of relief and anxiety from the gathered crowd."
Alternatives: "arrival of officials" or "arrival of law enforcement".
Colombian police were then sent into Ecuadorto secure the base and await the arrival of Ecuadoran authorities.
And once again, with the arrival of summer, authorities are cracking down on women for not covering up enough.
Upon the arrival of the authorities, Francisco Rafael's wife in between tears informed them of the former drug lord's identity.
The president determined to prepare relief expeditions to both forts, but, before the arrival of supplies, Confederate authorities demanded Fort Sumter's immediate evacuation.
Special Forces soldiers here said that conventional American forces from the 173rd Airborne Brigade were expected to enter the city on Friday and, with the arrival of Kurdish civil authorities, would help keep the looting in check.
BERLIN — Even as showrooms in Europe prepare for the arrival of 2014 vehicles, authorities in France have sparked controversy with a drastic action: blocking the registration — effectively shutting down sales — of some popular new Mercedes-Benz cars, including the A-Class, B-Class, CLA and SL models.
The story of Carter and Tut is one with which we are largely familiar; here Beauman explores the intriguing question of whether or not Carter broke into the inner sanctum of the tomb prior to the arrival of the Egyptian authorities.
In 2001, Israeli forces briefly took control of parts of Beit Jala for the first time since the arrival of the Palestinian Authority in the mid-1990s.
In some colonies, the fear of smallpox outbreaks, which coincided with the arrival of ships, induced health authorities to order mandatory home isolation of persons with smallpox (19 ), even though another controversial strategy, inoculation, was being used to protect against the disease.
