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
Hence it was necessary that they should be consulted when an aggressive war was contemplated, but not on occasion of a defensive war, where the other state had broken the treaty, nor on the conclusion of peace; it appears, however, that the question was in such a case addressed not to the usual assembly of the burgesses, but to the army.
Thus, in general, it was necessary to consult the burgesses whenever the king meditated any innovation, any change of the existing public law; and in so far the right of legislation was from antiquity not a right of the king, but a right of the king and the community.
In these and all similar cases the king could not act with legal effect without the cooperation of the community; the man whom the king alone declared a patrician remained as before a non-burgess, and the invalid act could only carry consequences possibly -de facto-, not -de jure-.
Thus far the assembly of the community, however restricted and bound at its emergence, was yet from antiquity a constituent element of the Roman commonwealth, and was in law superior to, rather than co-ordinate with, the king.
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Reference address : https://www.ellopos.net/elpenor/rome/1-05-original-constitution-rome.asp?pg=26