Simplify the following text for a Grade 11 native English-speaking person.
Original: The national flag of Pakistan was adopted in its present form during a meeting of the Constituent Assembly on August 11 , 1947 , just three days before the country 's independence , when it became the official flag of the Dominion of Pakistan .
Simplified: It was adopted by the Constituent Assembly on August 11 , 1947 , just days before independence .