What is the recommended procedure for towing an agricultural implement or trailer with a tractor on public roads?

1. Use an unbolted bent nail as a hitch pin
2. Use a hardened, rated hitch pin with a positive safety cotter pin (chaveta de seguridad), connect safety chains cross-lashed beneath the tongue, and connect auxiliary electrical trailer lights and reflectors
3. Tow with a rope while traveling at 80 km/h
4. Hold the trailer tongue by hand from the cab window