school rules; school regulations
Refers to rules established by a school for students, such as clothing, hairstyles, attendance, behavior, and use of phones.
この学校は校則が厳しい。
This school has strict rules.
校則で髪を染めることは禁止されている。
Dyeing your hair is prohibited by the school rules.
Students must follow the school rules.
He broke the school rules and came with dyed hair.
Using a smartphone violates the school rules.
This school is famous for having strict school rules.
The school rules prohibit dyeing one's hair.
The student council proposed revising the school rules.