The Ordinance of Montils-les-Tours (1454) was an important juncture in this period, as it ordered the official recording and homologation of customary law. Customs would be compiled by local practitioners and approved by local assemblies of the three estates, with disagreements resolved by the central court. At the time, the wholesale adoption of Roman law and the "ius commune" would be unrealistic, as the king’s authority was insufficient to impose a unified legal system in all French provinces. In the process of recording, local customs were sometimes simplified or reformed. By the 16th century, around sixty general customs were recorded and given official status, disqualifying any unrecorded customs from having official status. Roman law remained as a reserve, to be used for argumentation and to supplement customary law.