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
Maintenance of the Burgess-Rights Previously Conferred
In regulating the relations of Italy and of the capital, Sulla-- although he otherwise in general treated as null all state-acts done during the revolution except in the transaction of current business-- firmly adhered to the principle, which it had laid down, that every burgess of an Italian community was by that very fact a burgess also of Rome; the distinctions between burgesses and Italian allies, between old burgesses with better, and new burgesses with more restricted, rights, were abolished, and remained so.
In the case of the freedmen alone the unrestricted right of suffrage was again withdrawn, and for them the old state of matters was restored. To the aristocratic ultras this might seem a great concession; Sulla perceived that it was necessary to wrest these mighty levers out of the hands of the revolutionary chiefs, and that the rule of the oligarchy was not materially endangered by increasing the number of the burgesses.
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Reference address : http://www.ellopos.net/elpenor/rome/4-10-sullan-constitution.asp?pg=13