I don't think CRISPR gene editing is regulated, except by convention in the scientific community, and by the ethics boards of individual labs/universities. But there may come a day when we realize this tool is too dangerous to leave unregulated.
Well, you can't run a human trial without IRB approval, you can't run an animal study without IACUC approval, and you can't introduce a therapeutic without FDA approval so I'd say that's pretty tightly regulated.
You could do it on yourself, if you were able to afford the necessary research and equipment
You could if you wanted to die an unpleasant death.