minor, miner

Minor or minor ( mine or ) means a person under the legal age of adulthood--under 18, or under 21--
It is illegal for a minor to buy liquor.
He is still a minor; his parents will have to sign the contract.
Minor also means not important, or small--
He played ball in the minor leagues.
It was considered a minor offense.
Minor is also the name of a type of musical scale--
Music in a minor key sounds sad to many people.

Miner or miner ( mine er ) means someone who digs minerals, metal, coal, or gems out of the earth--
"...in a canyon, in a cavern, excavating for a mine, lived a miner, forty-niner..."
The country and western singer was proud to be a coal miner's daughter.

Now that you know that, you can say--
"It is no longer permitted for a minor to become a miner."

Note--"minority" is related to "minor".  Minority most commonly refers to a small group or set of persons, or to the losing set of votes in an election--
Having only a minority of the votes, the candidate lost the election.
How small of a group makes a minority? For the purposes of voting, anything less than 50% is a minority.
Note # 2-- "mine or" ( two words ) sound precisely the same as "minor" and "miner", above--
Whose soda is that?  Is it mine, or yours?