- A warning notice should be set up.
- Warning notice is put up around the ruins.
- Warning notices were strung out along the motorway.
- Warning notices must be readily understandable.
- Disobeying commands or instructions of the Employer or the representative of the Employer, and has already received warning notice for three times.
- Weather Bureau, according to the relevant County staff: "In the past, are contacted by phone, fax and other form of warning notice, warning terminals can now issued an early warning signal.