Juristically speaking, ‘amal means the practice of the courts, and in Mâlikî doctrine it has a regulative force. As it developed in North West Africa, and especially in Morocco, ‘amal represents a unique instance of Muslim case-law. A wealth of Maghribî legal literature bears witness to the paramount importance and the success that ‘amal has acquired as an official source of the law in Morocco. This literature includes collections of ‘responsa’ (fatâwî), ‘opinions’ (ajwibah), ‘precedents’ (nawâzîl), and ‘formularies’ (wathâiq). But besides these general works, there exist special collections of judicial precedents with critical and analytical commentaries. These were designed to serve as practical ‘amal manuals for the qâdîs, who, in Mâlikî doctrine, are required to follow the judicial practice even when it runs contrary to the predominant opinion (mashhûr) of the school.