Only a person who has the following qualification is authorized to do so :

1) He must have adequate knowledge of the Tafseer of the Qur'aan.

2) He must be a Hafiz of the ahadeeth of Rasoolullah (Sallallaahu-alayhi-wasallam)

3) He must be well versed in the Arabic language.

4) He must be familiar with the roots of words so that he knows where they are derived from.

5) He must be familiar with the nature and status of people.

6) He must be familiar with the basic principles of ta'beer or interpretation.

7) He must possess a pure and clean soul.

8) He must be a man with sound morality.

9) He must be honest in speech and conduct.