47 CFR § 13.10
Licensee address
February 16, 2021
In accordance with §1.923 of this chapter, all applicants (except applicants for a Restricted Radiotelephone Operator Permit or a Restricted Radiotelephone Operator Permit-Limited Use) must specify an address where the applicant can receive mail delivery by the United States Postal Service. Suspension of the operator license may result when correspondence from the FCC is returned as undeliverable because the applicant failed to provide the correct mailing address.
[78 FR 23153, Apr. 18, 2013]