| (2) | Should air traffic service personnel holding a current validation for a particular rating and having held such a validation for a minimum period of 12 months, be required to revalidate the particular rating at a different ATSU, such air traffic service personnel shall have provided the relevant service, under the supervision of an air traffic service instructor (operational), at an ATSU for which the rating validation is sought, for a period equal to at least 50 percent of the hours relevant to the original rating validation |
