Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Administration of Spain
The system of administration in the two Spanish provinces was similar to that of the Sicilo-Sardinian province, but not identical. The superintendence was in both instances vested in two auxiliary consuls, who were first nominated in 557, in which year also the regulation of the boundaries and the definitive organization of the new provinces took place.
The judicious enactment of the Baebian law (573), that the Spanish praetors should always be nominated for two years, was not seriously carried out in consequence of the increasing competition for the highest magistracies, and still more in consequence of the jealous supervision exercised over the powers of the magistrates by the senate; and in Spain also, except where deviations occurred in extraordinary circumstances, the Romans adhered to the system of annually changing the governors--a system especially injudicious in the case of provinces so remote and with which it was so difficult to gain an acquaintance.
The dependent communities were throughout tributary; but, instead of the Sicilian and Sardinian tenths and customs, in Spain fixed payments in money or other contributions were imposed by the Romans, just as formerly by the Carthaginians, on the several towns and tribes: the collection of these by military means was prohibited by a decree of the senate in 583, in consequence of the complaints of the Spanish communities.
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