As far as I know this is the first time any state has proposed bicycle registration (rather than individual cities). No mention of what the registration tag will look like or how it will be attached to the bicycle. If you're in NC and have an opinion you might let your representatives know.
https://www.scribd.com/document/400665092/NC-Bike-Bill#from_embed
https://www.scribd.com/document/400665092/NC-Bike-Bill#from_embed