source: Their participation is limited until they reach legal adulthood.
target: They cannot fully participate until the are a legal adult.
references: They cannot fully participate until the are a legal adult. They aren't able to participate until they are legal adults. They can't fully participate until they become adults. They cannot participate fully until they are adults. They can't fully participate until they are adults. Until they grow up the participation has a certain amount. Their involvement is limited until they become adults. Their participation is restricted under the reach the age of majority. Their participation is limited until they reach the age of legal adulthood. Full inclusion comes when they're an adult.