Regulation 88-D: Non-certified Thaumic Appliances The advertising or public display of non-certified thaumic appliances is strictly prohibited. This includes, but is not limited to, 'Resonance Boosters', 'Pocket Wardstones', and 'Self-Stirring Tea-Urns' of dubious origin.

Alistair’s Translation: 88-D is the Ministry's attempt to stop the Gutter from selling magic like it’s snake oil. It doesn't work. The 'Resonance Boosters' usually just explode, and the 'Self-Stirring Tea-Urns' are prone to developing a consciousness that objects to being used for Earl Grey.