I'm not sure of the exact word you are looking for, but the general idea is that the federal law will always reign supreme if there is ever a conflict between the federal and state laws. Federal law is superior or higher-ranking or more preferable, etc.
Here is the exact phrasing from Article VI of the US Constitution: "This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding."
The Persian empire had different lands under its command at different times, but at the time when it was the biggest, it had lands corresponding to todays: (550 BC)
Iran
Turkey
Egypt
Iraq
Kuwait
Syria,
Jordan
Israel
Palestine
Lebanon
and parts of Libya, Bulgaria and Greece
<span>Subculture or demographic? People born between 1965 and 1976 are commonly referred as the "Generation X". There is no precise subculture that labels this generation, however, in Western nations, the subculture of hip-hop, indie, and grunge music dominated the scene. </span>