I went back and checked the book on renewal. I did misremember what is says. The license is for 10 years. It’s the initial certification form that’s only good for 365 days. They also say that if your mail is returned as undeliverable they can revoke the license.
If you wanted to protect your privacy, you would have to take the test every year.
Another issue for me is that I’ve been around ionizing radiation and strong high frequency EMF’s (routinely up to 1000MW @ 345KV) most of my life. I think it’s now important for me to choose/limit my EMF exposure. Yeah, I know the canned non-ionizing radiation meme. That’s the typical training for military aged people. However, it conveniently ignores the problematic basic chemistry concept of valence. An ion (ionization) is the complete removal (or addition) of an electron. However, molecular forces of attraction are also influenced by the valence state of the attached electrons. You may remember hearing about covalent molecules (like dissolves like, and all that). An electron doesn’t have to be knocked off an atom (ionized) to cause problems. Knocking/exciting an atoms’ electron into a higher valence energy state will change how it interacts in its environment. Not to mention that an excited electron in an atom can emit a photon as it falls back down to a lower energy state or even destabilize the whole atom and cause it to dissinigrate and eject pieces even bigger than an electron. But, I digress. And yes, I am paranoid about the hushed rollout of 5G.