The holder of a pilot, flight instructor, or ground instructor certificate who has made a change in permanent mailing address may not, after 30 days from that date, exercise the privileges of the certificate unless the holder has notified in writing the FAA:

Airman Certification Branch
P.O. Box 25082
Oklahoma City, OK 73125

of the new permanent mailing address, or if the permanent mailing address includes a post office box number, then the holder's current residential address.