"The schools can open small outlets in their premises only to sell NCERT books and other stationery items. They are not allowed to sell any book from private publishers," the Board said in a communication to schools.
"Selling books other than those from NCERT will be considered a violation and will attract action against the school. Parents are free to buy textbooks and stationery items from either the shop in school premises or vendors outside," it added.
Amending its earlier directive, the CBSE in August allowed schools to open shops in their premises to sell NCERT books, stationery and other material required by students.
The Board had earlier asked managements to not run schools as "commercial establishments" and stop selling books and uniforms in their premises.