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
Fixing of the Limits of Latium
With this closing of the confederacy was connected the geographical settlement of the limits of Latium. So long as the Latin confederacy continued open, the bounds of Latium had advanced with the establishment of new federal cities: but as the later Latin colonies had no share in the Alban festival, they were not regarded geographically as part of Latium. For this reason doubtless Ardea and Circeii were reckoned as belonging to Latium, but not Sutrium or Tarracina.
Isolation of the Later Latin Cities as Respected Private Rights
But not only were the places on which Latin privileges were bestowed after 370 kept aloof from the federal association; they were isolated also from one another as respected private rights. While each of them was allowed to have reciprocity of commercial dealings and probably also of marriage (-commercium et conubium-) with Rome, no such reciprocity was permitted with the other Latin communities. The burgess of Satrium, for example, might possess in full property a piece of ground in Rome, but not in Praeneste; and might have legitimate children with a Roman, but not with a Tiburtine, wife.(18)
18. This restriction of the ancient full reciprocity of Latin rights first occurs in the renewal of the treaty in 416 (Liv. viii. 14); but as the system of isolation, of which it was an essential part, first began in reference to the Latin colonies settled after 370, and was only generalized in 416, it is proper to mention this alteration here.
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Reference address : https://www.ellopos.net/elpenor/rome/2-05-subjugation-latins-campanians.asp?pg=19