This is the 17407th most frequent Korean word.
선포되면
"선포되면" means "if/when proclaimed" in English.
Here, '선포되면' describes the condition 'if proclaimed', indicating an official declaration of the law.
새로운 법이 선포되면 우리는 그것을 따라야 합니다.
If a new law is proclaimed, we must adhere to it.
The word '선포되면' expresses 'if declared' in the context of announcing an occurrence of war.
전쟁이 선포되면 사람들은 긴장하게 됩니다.
If war is declared, people will become tense.
In this sentence, '선포되면' signifies 'if announced' referring to the official establishment of a holiday.