The comments of Suneeta are very good. Also, please review below to have a fair idea.
Safety Clause in Appointment Letter
The safety of employees is of utmost importance to the management. Hence, you are bound to observe all safety rules as notified by the management from time to time and to use safety equipment as and when required. Breach of these rules will be viewed as serious misconduct and will make you liable for disciplinary action.
Regards