It was accordingly agreed that the Emperor should nominate, not only the President, but two assessors. Of the other twenty members, the seven Electors were each to send one delegate; the six Circles, with Austria and the Netherlands, one apiece. From the imperial towns two more were to come, while one Elector in rotation, one temporal and one spiritual Prince, were always to have a seat. The Council, thus constituted, was to have the initiative in the negotiation of foreign alliances, and in settling feudal questions, subject, however, to the confirmation of the Emperor. Its powers, for the present at least, were only to continue during Charles’ absence. At the same time, the Imperial Chamber (_Reichskammergericht_) was slightly altered. The Emperor was to nominate the President and two assessors. The others were to be elected by the Electors and the Circles, while two were to represent the hereditary dominions of the House of Hapsburg. The most difficult question yet remained. How were the members of these bodies to be paid? If no permanent revenue were established, continuity would be impossible, and if the Emperor were to pay them, the real control would lie with him. Accordingly, the old controversies began again. The plan of the Common Penny having failed (p. 111), the novel idea of establishing a system of custom-duties on all imports coming into the Empire was suggested. Had this been carried, a kind of customs-union (_Zollverein_) would have been set on foot which might in time have led the way to a closer political union. It was, however, violently opposed by the towns and merchants, who declared that the burden would fall on them and ruin trade; and, accordingly, the Diet fell back on the system of the ‘matricula’ of 1507 (cf. p. 114). 2. Difficulties also arose on the question of the army. The war with France had already been commenced by the invasion of Spanish Navarre by the French, and by the attack of Robert de la Marck, the Lord of Bouillon, on Luxembourg. Charles also was eager to enter Italy that he might put it to the arbitrament of war, ‘whether he should become a very poor Emperor, or Francis a sorry King.’ Yet all the Diet would provide was a levy of some 4000 cavalry and 20,000 infantry, levied on the separate states according to the system of the ‘matricula.’ It was further decreed that each contingent should be under its own officers, and that the commander-in-chief, though appointed by the Emperor, must be a German. This ‘matricula’ or imperial roll was the last ever drawn up, and thus became the model for future imperial levies. From 1535 onwards, the system was gradually adopted of substituting for the men themselves the money necessary to pay the contingent--the money being assessed on the separate States, according to their liability on the roll of 1521. The grants were termed ‘Roman Months,’ because they originated with the vote for the Roman expedition of 1521.