13. Use the right knife hand and the left fork hand.

Reason: It’s appropriate table manners.
Exception: If you are left-handed, there can be an exception.
This lengthy list should have taught you one thing: the Royal Family takes dining manners—and really, all manners—very seriously. The one-minute rule, for instance, deals with how you hold your silverware.
Right-hand knife, left-hand fork © Alexey Khakimov/Shutterstock
The Royal holds the knife in his right hand and the fork in his left, the tines facing down. The Royals balance their food on the back of their forks and then bring it to their mouths, as opposed to stabbing at it.