Persons that sell, rent, install, service or repair weighing and measuring devices that are used for commercial purposes, are required to be licensed by the State of California, Department of Food and Agriculture, Division of Measurement Standards (DMS). Service agents must report installations of new devices and repair of existing devices to the Sealer on Weights and Measures within 24 hours of completion of work. Inspection staff then verifies the accuracy of the work by testing and sealing those devices.