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
Lastly from the increasing extent of the Roman community it became necessary, out of regard to the convenience of litigants, to station in the more remote townships special judges competent to deal at least with minor civil causes.
This arrangement was the rule for the communities of burgesses -sine suffragio-,(12) and was perhaps even extended to the more remote communities of full burgesses,(13)--the first germs of a Romano-municipal jurisdiction developing itself by the side of that which was strictly Roman.
12. Cf. II. VII. Subject Communities
13. This inference is suggested by what Livy says (ix. 20) as to the reorganization of the colony of Antium twenty years after it was founded; and it is self-evident that, while the Romans might very well impose on the inhabitant of Ostia the duty of settling all his lawsuits in Rome, the same course could not be followed with townships like Antium and Sena.
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Reference address : https://www.ellopos.net/elpenor/rome/2-08-law-religion-army-economy-nationality.asp?pg=9