Sec. 63.21 - Change of address.
Within 30 days after any change in his permanent mailing address, the
holder of a certificate issued under this part shall notify the Department
of Transportation, Federal Aviation Administration, Airman Certification
Branch, Post Office Box 25082, Oklahoma City, OK 73125, in writing, of his
[Doc. No. 10536, 35 FR 14075, Sept. 4, 1970]