That a state had the right to ignore a law, if it thought the law was unconstitutional
ignore the law
If the federal regulations to which you refer have the "force of law" then, yes.
I'm not sure what agency law is. Agencies don't make laws they make regulations, and no, regulations are not the same as laws. Regulations can have the force of laws.
You can find the total number of regulations in the IRS tax law on irs.gov/Tax-Professionals/Tax-Code,-Regulations-and-Official-Guidance
RULESA regulation is a rule or law
To break a law. To be in conflict with the rules or regulations of some authoritative body.
Regulations.
It is federal law that requires restrictions, not state law.
No, "law" is a noun that refers to a system of rules and regulations set by a governing authority. It can also refer to the field of study that focuses on these rules and regulations.
because you could get arrested.
Standards and regulations issued by OSHA are examples of Administrative Law.