noun, noun or participle which takes 'suru', intransitive verb
must arrive by; must be received by; deadline for delivery
Used in formal instructions for documents, applications, or items that must reach a destination by a specified date/time. Often seen as 必着 on envelopes or in submission guidelines.
応募書類は10月31日必着です。
Application documents must arrive no later than October 31st.
申込書は金
Please send the application form so that it arrives by Friday.
noun, noun or participle which takes 'suru', transitive verb
must wear; must be worn; mandatory to have on
Used in rules or notices requiring the wearing of something, especially safety equipment like seatbelts or helmets. Often appears in the pattern ～必着.
この工事現場ではヘルメット必着です。
Hard hats must be worn at this construction site.
後部座席でもシートベルト必着。
Seatbelts must be worn even in the back seat.