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
In the case of all fines of more than two sheep and thirty oxen or, after the cattle-fines had been by the decree of the people in 324 commuted into money, of more than 3020 libral -asses- (30 pounds), the decision soon after the expulsion of the kings passed by way of appeal into the hands of the community;(2) and thus procedure by fine acquired an importance which it was far from originally possessing.
2. Cf. II. I. Right of Appeal
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Reference address : https://www.ellopos.net/elpenor/rome/2-08-law-religion-army-economy-nationality.asp?pg=2