gerry, you’ve been conned. It’s a certificate of Proficiency not a license and it’s ignored. Anyone can buy, install and use a marine VHF ($229 at Whitworths). Nobody ever checks certificates, except some yacht club race officials. Any summer weekend you can unfortunately hear the results. An HF installation is a different matter.
I happen to have an operators licence - cardboard, issued in 1968, for HF and VHF. it’s only been inspected once - in Croatia when I chartered a yacht a few years ago.