 The testing of chemicals is labor-intensive and expensive.Often the same chemical is tested in several countries simultaneously, which means that redundant animal tests are performed.To relieve some of this burden, the OECD Council adopted a decision in 1981, stating that data generated in a member country, in accordance with OECD Test Guidelines and Principles of Good Laboratory Practice (GLP), shall be accepted in other member countries for assessment purposes and other uses relating to the protection of human health and the environment.