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
As the law had hitherto stood, every sovereign city founded by Rome and Latium took its place among the communes entitled to participate in the federal festival and federal diet, whereas every community incorporated with another city and thereby politically annihilated was erased from the ranks of the members of the league. At the same time, however, according to Latin use and wont the number once fixed of thirty confederate communities was so adhered to, that of the participating cities never more and never less than thirty were entitled to vote, and a number of the communities that were of later admission, or were disqualified for their slight importance or for the crimes they had committed, were without the right of voting. In this way the confederacy was constituted about 370 as follows.
Of old Latin townships there were--besides some which have now fallen into oblivion, or whose sites are unknown--still autonomous and entitled to vote, Nomentum, between the Tiber and the Anio; Tibur, Gabii, Scaptia, Labici,(15) Pedum, and Praeneste, between the Anio and the Alban range; Corbio, Tusculum, Bovillae, Aricia, Corioli, and Lanuvium on the Alban range; Cora in the Volscian mountains, and lastly, Laurentum in the plain along the coast.
15. Livy certainly states (iv. 47) that Labici became a colony in 336. But--apart from the fact that Diodorus (xiii. 6) says nothing of it--Labici cannot have been a burgess-colony, for the town did not lie on the coast and besides it appears subsequently as still in possession of autonomy; nor can it have been a Latin one, for there is not, nor can there be from the nature of these foundations, a single other example of a Latin colony established in the original Latium. Here as elsewhere it is most probable--especially as two -jugera- are named as the portion of land allotted--that a public assignation to the burgesses has been confounded with a colonial assignation ( I. XIII. System of Joint Cultivation ).
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Reference address : https://www.ellopos.net/elpenor/rome/2-05-subjugation-latins-campanians.asp?pg=17