What were the two main reasons workers formed unions?
as a form of social protest and to protect themselves from poor work conditions

for a social group and to protect themselves from poor work conditions

for a social group and to strike if they didn't get what they wanted

as a form of social protest and to strike if they didn't get what they wanted

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.