|This article is non-canon.
This article covers a subject that has been deemed non-canon by either the author or the Harry Potter licensees, and thus should not be taken as a part of the "real" Harry Potter universe.
- "Any unauthorised textbooks will be confiscated immediately from the offending student."
- —The Decree 
The Educational Decree Number One-Hundred and Thirty-Three was one of the Educational Decrees created by Dolores Umbridge, then-Headmistress of Hogwarts School. This Educational Decree gave Dolores Umbridge the power to confiscate any unauthorised books from students.
Behind the scenes
- As the numbering for this Educational Decree is not consistent with the numbering established in Harry Potter and the Order of the Phoenix, it cannot be considered canonical.
- Harry Potter and the Order of the Phoenix (film) (First appearance)