The reevaluation and reapproval by the Environmental Protection Agency of pesticides originally registered prior to 1984. The purpose of reregistration is to evaluate and approve the older formulations against modern scientific and regulatory standards. The process is scheduled to be completed on the older active ingredients by the end of 2002.

The reevaluation and relicensing of existing pesticides originally registered prior to current scientific and regulatory standards. EPA reregisters pesticides through its Registration Standards Program.