As food safety is so important to everyone, you as food handlers have legal, ethical and economic responsibility to keep food safe to eat. Rules cover the handling of food have existed for centuries, in modern times, laws have been developed to cover every aspect of the handling and sales of food. General speaking the legislation aims to protect consumers from illness and injury by requiring food to be wholesome and fit to eat.
The approach to food safety required by law is to anticipate food safety problems before they actually occur, and take appropriate steps to prevent them, there is a recognized system, known as HACCP (hazard analysis critical control point). There is also a legal requirement for companies working with food to take every reasonable care in all food safety issues. This can usually be achieved by following good working practices.