The plebeian assembly, which had perhaps originally met by curiae, was organized on the basis of the territorial tribes in 471 B.C. This change suggested a renewed organization of the whole people for comitial purposes.
Valid meetings might be held on any of the 194 "comitial" days of the year which were not market or festal days (nundinae, feriae).
The comitia survived the Republic. The last known act of comitial legislation belongs to the reign of Nerva (A.D.