The Code of Wand Use is a regulation of wand usage, probably legislated by the Ministry of Magic. Clause Three of the Code (this clause is also known as The Wand Ban) states that "No non-human creature is permitted a wand."
The Brotherhood of Goblins were a group pressing for Goblin rights, which included the right to carry and use a wand.
The main well-known breach of the Code of Wand Use was a breach of Clause Three. When, at the Quidditch World Cup in 1994, the Dark Mark was conjured by an unknown individual, the caster used Harry Potter's wand, which had been dropped or possibly stolen, sometime between when he left the Top Box, and when he and his friends, Ronald Weasley and Hermione Granger, took refuge in the nearby woods, used it to conjure the Mark before disapparating. Winky, a house-elf belonging to Bartemius Crouch Sr., was discovered, unconcious, with the wand moments later by Amos Diggory. She had been stunned by the Stunning Spells the Ministry of Magic wizards had cast upon arrival. Amos Diggory mentions and outlines the details of the breach.
- Harry Potter and the Goblet of Fire (First appearance)