To maintain its integrity an oligarchy must keep its numbers small and must prevent individuals from gaining too great eminence or popularity. The traditional acceptance by the masses of certain families as the only families qualified to furnish rulers for the state had kept the nobility a close corporation. To accomplish the second object, that is, to prevent an ambitious individual from rising too rapidly to power, from holding his authority too long a time, and from securing too strong and compact a following, the senate had hedged the magistracies about with a number of legal safeguards. The strict laws enacted before the time of the Gracchi against bribery and prescribing a secret ballot were passed to protect the nobility, and not in the interests of morality. Custom at first, and later, legislation, fixed minimum age requirements for most of the offices, established a certain order in which they must be held, and required an interval between the incumbency of two successive magistracies. The reactionary recasting of the constitution under Sulla illustrates well the aristocratic policy in these matters. In it the important magistracies stand in the order of quaestorship, aedileship, praetorship, and consulship, and a two-year interval was necessary between each two. The minimum age requirement for the consulship was forty-three years, and no one might be reëlected to a magistracy until a period of ten years had expired. This is essentially the system which had been gradually worked out during the flourishing period of the oligarchy. It had also always been a fundamental principle of the Republic that no magistrate should hold office for more than a year, except the censor, whose term was eighteen months. This provision of the constitution took from the magistrate his power and desire to initiate political action. He had been a senator for many years before becoming consul. In twelve months he would be a senator again. He did not lose class-consciousness during his short term of office. If he had wished to assert himself, it would have been impossible. The senate was a body of trained administrators, many of whom had a wider technical knowledge of the questions at issue than he had himself. It was a body of men bound together by mutual self-interest, which had a tradition of centuries behind it. The danger point in the system for the oligarchy lay in the fact that an army and unlimited authority had to be given to the governor of a province. The senate tried to minimize this danger by keeping a tight grip on the purse-strings when appropriating money and in voting troops for the provinces, and by requiring governors to submit their arrangements in the provinces to the senate for ratification, when their terms had expired.