the same written test as Conditional and General. General was the renamed Class B. 5-year license, full privileges except no phone privileges on the bands between 2.5 and 25 MHz (temporary restriction - see below). 13 wpm code and the same written test as Conditional and Technician. FCC exam only. Conditional was the renamed Class C. 5-year license, full privileges except no phone privileges on the bands between 2.5 and 25 MHz (temporary restriction - see below). 13 wpm code and the same written test as General and Technician. Exam by mail. Advanced was the renamed Class A. 5-year license, full privileges. Advanced required holding a General or Conditional for at least 1 year, plus an added written test. If the prospective Advanced had a Conditional, s/he had to pass 13 wpm code and the same written test as General and Technician at an FCC exam session before being allowed to try for Advanced. FCC exam only. Amateur Extra was a new 5-year license, full privileges. Required holding an Advanced, General or Conditional for at least 2 years, plus 20 wpm code and an added written test. If the prospective Extra had a Conditional, s/he had to pass 13 wpm code and the same written test as General and Technician at an FCC exam session before being allowed to try for Extra. FCC exam only. The new Amateur Extra was intended to replace the Advanced as the top license. No new Advanced licenses would be issued after December 31, 1952. Note that the Advanced class license was made available again for new issues on November 22, 1967 with the incentive licensing program. Advanced class was still attainable in the interim by those migrating from Class A. The 1951 restructuring meant that anyone who wanted HF 'phone on the bands between 2.5 and 25 MHz would have to get an Extra if they didn't get an Advanced before the end of 1952. This caused a number of amateurs to get Advanced licenses before they became unavailable at the end of 1952. However, near the end of 1952, FCC reversed its policy and gave full privileges to Generals and Conditionals, effective mid-Feb 1953. For the next years, there were 6 license classes in the US (Novice, Technician, General, Conditional, Advanced and Amateur Extra) and four of those classes had full privileges. Only Novices and Technicians did not have full privileges. Over time,