- Definition (CVC §406): “motorized bicycle” or “moped” — automatic transmission; motor < 4 gross bhp; ≤ 30 mph on level ground; pedals or electric-only variants as defined in statute.
- License: M1 or M2; age ≥ 16 (DMV / handbook materials).
- Registration: special plate (CVC §5030); DMV describes a one-time fee and that the plate does not renew like other vehicles.
- Insurance: DMV registration guidance states you do not need insurance to register a moped. That is not a statement about crash liability — read CVC disclosures and your insurer.
- Helmet: DOT helmet required for motorized bicycle operators/passengers (CVC §27803).
Official links: CA DMV mopeds page, CVC §406, CVC §27803.
Index: US moped laws.