The highest age of majority is Mississippi. They have set it at
21 years old. Most have it set at 18, but there are a handful set
at 19, such as Nebraska. Emancipation laws vary, but are usually
set at a minimum age of 16.
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There is no age gap set. As long as both are over the age of
consent there is no crime. The age in Alabama is set at 16.
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The government of a country or independent state may set any age
limit it wishes