The US Food and Drug Administration (FDA) has issued a new set of guidelines intended to cover the entire US food supply, from farm to fork, against the threat of a bio-terrorist attack. The guidelines, which come into effect today [Wednesday] include a list of safety measures and precautions to be followed by food processors, retailers, farmers and hauliers. There are two sets of guidelines, for importers and domestic producers, and while they are not legally binding, the recommendations are classed as regulation and thus become standards customarily adhered to by companies.