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
The right
of the senate to give dispensation in particular cases from the laws
was restricted (687); as was also the abuse whereby every Roman of rank,
who had private business to attend to in the provinces, got himself
invested by the senate with the character of a Roman envoy thither
(691). They heightened the penalties against the purchase
of votes and electioneering intrigues (687, 691); which latter
were especially increased in a scandalous fashion by the attempts
of the individuals ejected from the senate(1) to get back
to it through re-election.
What had hitherto been simply understood as matter of course
was now expressly laid down as a law, that the praetors were bound
to administer justice in conformity with the rules set forth by them,
after the Roman fashion, at their entering on office (687).