The Educational Decree Number Thirty was one of the Educational Decree created by Dolores Umbridge, then-Hogwarts High Inquisitor. This Educational Decree banned all joke products manufactured by the Weasley twins.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/TlDp7LBbDfGc1_mdJVb8UA== | 5.88129e-14 |