Legality (noun)

1. The quality or state of being lawful or in accordance with the law.
2. The condition of being valid or acceptable according to law.

Origin:

From late latin 'legalitas' meaning 'the quality or condition of being lawful'.

Examples:

1. The legality of the contract was questioned and had to be reviewed by a lawyer.
2. The legality of the vote was challenged and had to be verified by an election observer.
3. The legality of the marriage was questioned and had to be confirmed by a marriage license.
4. The legality of the immigration status was doubted and had to be verified by an immigration officer.
5. The legality of the transaction was investigated and had to be approved by a regulatory agency.