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
There was destined for distribution only the Italian domain-land,
that is to say, substantially, the territory of Capua, and, if this
should not suffice, other Italian estates were to be purchased
out of the revenue of the new eastern provinces at the taxable value
recorded in the censorial rolls; all existing rights of property
and heritable possession thus remained unaffected. The individual
allotments were small.
The receivers of land were to be poor
burgesses, fathers of at least three children; the dangerous
principle, that the rendering of military service gave a claim
to landed estate, was not laid down, but, as was reasonable and had
been done at all times, the old soldiers as well as the temporary
lessees to be ejected were simply recommended to the special
consideration of the land-distributors. The execution of the measure
was entrusted to a commission of twenty men, into which Caesar
distinctly declared that he did not wish to be himself elected.