Use the Precautions tab on the Hazards screen to define precautions for the selected hazard. You can associate multiple precautions. It is not necessary to associate any precautions, but later the Safety tabs the precautions associated to the hazard are displayed first (pre-selected) on the Precaution lookup.
The only field available on this tab is Sequence. Use Sequence to order the precautions by their relevance or priority as they relate to the associated hazard. The system will not require a Sequence, nor does it require it to be unique when you enter it.