2019-03-18. Technical Bulletin 193 provides instructions that applies to California Proposition 65 Hang Tag Reminder (Californian Market Only), Front Subframe Cable Clips, Alternator Cover Sealant, Chassis ECM DTCs Flagged Incorrectly, Pin Point Test - Power Source Voltage Drop/Voltage Rise, Inner Tube Valve Nut, Swinging Arm/Chain Rubbing Strip - Parts Kit, Service Manual Correction - Rear Brake Disc Minimum Thickness, Service Manual Correction - Main Bearing Selection, Owners Handbook Correction - Scheduled Maintenance Chart, Motorcycle Assembly Guide - Windscreen Installation. NHTSA's copy of the document (PDF)
Bulletins from the manufacturer that mention a maintenance schedule or a service interval, as NHTSA summarises them. They are not the schedule itself: read the document, and the owner's manual.
Position 8 of a VIN names the engine on many vehicles: how to read a VIN. Safety equipment depends on the trim, so decode a VIN to see what one vehicle has.