MES PW 67602 is the same Mazda engineering standard as the entry listed on this site under the designator with the space removed, and the two pages exist because the designation has been written in two ways. The document is an electromagnetic compatibility requirement for components of the kind that the manufacturer issues to its suppliers, stating the disturbance a component must tolerate and the disturbance it may emit at a given mounting position and citing the test methods by which each is measured. Nothing distinguishes the two entries other than the punctuation of the designator, so a reader should treat them as one standard and use the form of the designation that appears in the customer's engineering specification, which is the form that must be quoted in a test report.