Not really, though a curfew can, and often is, imposed during a state of emergency
Regulation.
A synonym for emergency is accident. An antonym for emergency is calm.
The state of Arkansas does not have a curfew but some counties set curfews.
It depends on the state and local regulations. Some states may have different curfew times for minors during the summer months while others may maintain the same curfew throughout the year. It is important to check with your specific state or city to see if there are any changes to the curfew during the summer.
Curfew times always vary by state laws, but also by families.
No curfew for the state but some counties/cities have them
Yes, but can depend on the jurisdiction and/or age of the defendent. For example, a curfew violation of a juvenile is considered a status offense, not a misdemeanor.
There is no curfew in the UK, nor, I believe, in any European country, nor in the USA or Canada. In fact, I would say that most countries don't have a curfew.
18 is the age of majority in Nebraska, there is no curfew for these persons.
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If you are asking about a legal curfew set by law - it is totally dependent on whether your town, city, county or state has such a curfew law anhd what it says.
A synonym for city-state would be a sovereign city-state, or a self-governing city-state.