In the 18th Amendment, in which year was the responsibility for textbook development shifted from Federal to Provincial?

In the 18th Amendment, in which year was the responsibility for textbook development shifted from Federal to Provincial?

اٹھارویں ترمیم میں نصابی کتب کی ترقی کی ذمہ داری وفاق سے صوبائی کو کس سال منتقل کی گئی؟
Explanation

The 18th Amendment was passed in the National Assembly on April 8, 2010 and received the assent of the President on April 19, 2010.

The amendment devolved the responsibility for education policy, planning, curriculum, and standards to the provinces.