View all text of Subjgrp 231 [§ 13.1 - § 13.19]
§ 13.15 - License term.
First Class Radiotelegraph Operator's Certificates, Second Class Radiotelegraph Operator's Certificates, and Third Class Radiotelegraph Operator's Certificates are normally valid for a term of five years from the date of issuance. All other commercial radio operator licenses are normally valid for the lifetime of the holder.