One challenge of federalism is thatpower author authority concentrated in the central government and can take away people's rightssometimes officials from different levels of governments disagree on who should be in charge of his situationlocal governments power, which grades problems for trade with other nationsofficials from state governments have too many rules to follow to be effective leaders

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.