Also, man-made borders that are well patrolled and protected can limit the spread of disease when affected livestock is turned back. Sometimes, one section of a country is more advanced than others. The advanced section might have a stronger animal health program that allows for the production of disease-free livestock and products. Advanced, well protected, and geographically isolated areas will become recognized low-risk regions. The risk classification for areas within a country will differ according to the risks involved.
Risk assessment consists of identifying risk factors and evaluating their seriousness.
Under the new regulations, the risk levels have been expanded. Now, instead of just two, the rules allow for six levels of risk. These factors are all examined when assigning a risk classification to a region. However, a region doesn't receive just one classification. A region can receive a classification for each species of animal and each type of disease.