A local school system or educational institution may disclose personally identifiable information from the student records of a student who is in attendance at the institution or system if that information has been designated as directory information under §C of this regulation. A local school system or educational institution may disclose directory information from the student records of an individual who is no longer in attendance at the system or institution without following the procedures under §C of this regulation. A local school system or educational institution which wishes to designate directory information shall give public notice of the following: The categories of personally identifiable information which the institution has designated as directory information; The right of the parent or guardian of the student or the eligible student to refuse to permit the designation of any or all of the categories of personally identifiable information with respect to that student as directory information; and The period of time within which the parent or guardian of the student or the eligible student must inform the local school system or educational institution, in writing, that this personally identifiable information is not to be designated as directory information with respect to that student.