Historical clue formulations

• Allowed — 2024-12-20
• Permitted by law — 2024-11-18
• OK — 2024-03-01
• Not forbidden — 2023-12-27
• Permitted — 2023-11-26
• Aboveboard — 2023-02-24
• Aboveboard — 2022-05-03
• Lawful — 2021-08-12
• Legal — 2020-09-06
• Authorized — 2020-03-29
• O.K. — 2019-11-02
• Lawful — 2015-05-18
• Legally allowed — 2012-07-31
• Kosher — 2007-07-19
• Permissible — 2007-05-07
• Allowed — 2003-09-20
• Permissible — 2000-07-17
• Authorized — 1998-05-12
• Legal — 1998-05-05
• On the up and up — 1998-02-03
• Permissible — 1997-12-12
• Allowable — 1997-04-29
• Permitted by law — 1994-10-10