О ТЕХНИКЕ БЕЗОПАСНОСТИ И ГИГИЕНЕ ТРУДА НА ПОРТОВЫХ РАБОТАХ. Конвенция. Международная организация труда. 06.06.79 152

Article 8

     Any time that a workplace has become unsafe or there is a risk of
injury to health,  effective measures  shall  be  taken  (by  fencing,
flagging or other suitable means including, where necessary, cessation
of work) to protect the workers until the place  has  been  made  safe
again.