This rule establishes a tolerance for combined residues of the insecticide cyromazine (N-cyclopropyl-1,3,5-triazine-2,4,6-triamine) and its major metabolite melamine, 1,3,5-triazine-2,4-6-triamine calculated as cyromazine in or on the raw agricultural commodity (RAC) tomato. The regulation to establish a maximum permissible level for residues of the insecticide was requested in a petition submitted by the CIBA-Geigy Corporation, P.O. Box 18300, Greensboro, NC 27419.