The collegiate principle, from which the third and subsequently most current name of the annual kings was derived, assumed in their case an altogether peculiar form. The supreme power was not entrusted to the two magistrates conjointly, but each consul possessed and exercised it for himself as fully and wholly as it had been possessed and exercised by the king. This was carried so far that, instead of one of the two colleagues undertaking perhaps the administration of justice, and the other the command of the army, they both administered justice simultaneously in the city just as they both set out together to the army; in case of collision the matter was decided by a rotation measured by months or days. A certain partition of functions withal, at least in the supreme military command, might doubtless take place from the outset--the one consul for example taking the field against the Aequi, and the other against the Volsci--but it had in no wise binding force, and each of the colleagues was legally at liberty to interfere at any time in the province of the other. When, therefore, supreme power confronted supreme power and the one colleague forbade what the other enjoined, the consular commands neutralized each other. This peculiarly Latin, if not peculiarly Roman, institution of co-ordinate supreme authorities--which in the Roman commonwealth on the whole approved itself as practicable, but to which it will be difficult to find a parallel in any other considerable state --manifestly sprang out of the endeavour to retain the regal power in legally undiminished fulness. They were thus led not to break up the royal office into parts or to transfer it from an individual to a college, but simply to double it and thereby, if necessary, to neutralize it through its own action. Term of Office As regards the termination of their tenure of office, the earlier -interregnum- of five days furnished a legal precedent. The ordinary presidents of the community were bound not to remain in office longer than a year reckoned from the day of their entering on their functions;(4) and they ceased -de jure- to be magistrates upon the expiry of the year, just as the interrex on the expiry of the five days. Through this set termination of the supreme office the practical irresponsibility of the king was lost in the case of the consul. It is true that the king was always in the Roman commonwealth subject, and not superior, to the law; but, as according to the Roman view the supreme judge could not be prosecuted at his own bar, the king might doubtless have committed a crime, but there was for him no tribunal and no punishment. The consul, again, if he had committed murder or treason, was protected by his office, but only so long as it lasted; on his retirement he was liable to the ordinary penal jurisdiction like any other burgess.