This is the 3393rd most frequent Korean word.
당국자들이
"Authorities" or "officials."
In this sentence, '당국자들이' refers to officials or representatives from governing or administrative bodies announcing regulations.
당국자들이 새로운 규정을 발표했습니다.
The authorities have announced new regulations.
Here, '당국자들이' is used to denote those in authority collectively making a commitment.
모든 당국자들이 즉각적인 조치를 취하겠다고 약속했습니다.
All authorities promised to take immediate action.
In this usage, '당국자들이' indicates that the officials are undertaking an investigative activity.