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
The Club System Restricted
The club system was checked, more effectually than was possible through prohibitive laws, by the change of the constitution; inasmuch as with the republic and the republican elections and tribunals the corruption and violence of the electioneering and judicial -collegia---and generally the political Saturnalia of the -canaille--- came to an end of themselves. Moreover the combinations called into existence by the Clodian law were broken up, and the whole system of association was placed under the superintendence of the governing authorities.
With the exception of the ancient guilds and associations, of the religious unions of the Jews, and of other specially excepted categories, for which a simple intimation to the senate seems to have sufficed, the permission to constitute a permanent society with fixed times of assembling and standing deposits was made dependent on a concession to be granted by the senate, and, as a rule, doubtless only after the consent of the monarch had been obtained.
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Reference address : https://www.ellopos.net/elpenor/rome/5-11-old-republic-new-monarchy.asp?pg=92