The earliest complete account of the qualifications of a Mujtahid is given in Abu' Husayn al-Basri's (d. 436/1044) al-Mu'tamad fi Usul al-Fiqh. The broad outline of al-Basri's exposition was later accepted, with minor changes, by al-Shirazi (d. 467/1083), al-Ghazali (d. 505/1111) and al-Amidi (d. 632/1234). This does not mean that the requirements of Ijtihad received no attention from the Ulema who lived before al-Basri, however they did not see it necessary to lay down the conditions for Ijtihad in this manner.The Hanafi jurists, Fakhr al-Islam 'Ali b. Muhammad al-Bazdawi (d.483 A.H.) and `Ubaydullah ibn Mas'ud Sadr al-Shar‟iah both stated that to perform Ijtihad a jurist should have knowledge of the Qur‟an together with its meaning, dictionary and legal, and its various divisions, of the traditions (Hadith) including the texts and authorities thereof, and of the rules of analogical deduction (Qiyas).38

The following are the qualifications needed to perform Ijtihad, these qualifications are derived from the definition of Ijtihad which is based on specific evidences as explained earlier:

A. The Mujtahid must be a Muslim male or female of sound mind who has attained a high level of intellectual competence.

B. Since the text of the Qur‟an and Sunnah were revealed in the Arabic language, Ijtihad can only be performed based on the Arabic text. One must have knowledge of the Arabic language to the extent that it enables a correct understanding of the Qur‟an and the Sunnah. A complete command in Arabic is not a requirement for some kinds of Mujtahideen, but the Mujtahid must, at least, know the fine points of the language related to the subject at hand. He must also be able to comprehend the sources accurately and deduce the rule from them. He should know enough by which he can understand the circumstances of the Arabs, the current customary usage in their speech such that he can distinguish the textual indications (Dalaalat al-alfaaz) in terms of the following: congruence (Mutaabaqah), inclusivity (Tadmeen), requisite (Iltizaam), Mufrad (singular), Murakkab (construct), comprehensive (Kulli), partial (Juz‟i), Haqeeqah (literal), Majaaz (metaphorical), homonym (Ishtiraak), synonym (Taraaduf), uttered meaning (Mantuq) and implied meaning (Mafhum) etc.