But despite any of these, no, UFC fighters do not have to register their hands anywhere even if they are potentially lethal. They don't have to register any of their body parts.

Are trained fighters hands considered weapons?

And if you're wondering, they define “expert” as “a person trained in the arts of karate, judo or other hand-to-hand fighting technique, whereby the hands, feet or other parts of the body are used as weapons, who shall have completed at least one level of training therein and shall have been issued a belt or other ...

Can someone have registered hands?

Any person who is an expert in the art of karate or judo, or any similar physical in which the hands and feet are used as deadly weapons, is required to register with the Department of Revenue and Taxation… An exception to this is that U.S. military members, as well as law enforcement, are not required to register.