This part of ISO 16232 defines the rules and the forms of expression and presentation of the results of measurements of particulate cleanliness of components for the fluid circuits of motor vehicles. It also defines a cleanliness coding system for simplifying the reporting and communication of particulate contamination data. This part of ISO 16232 also defines the rules to be used for specifying cleanliness requirements. This part of ISO 16232 does not concern the expression of particulate cleanliness of fluids.