August 5, 1996
The National Archives and Records Administration, with the concurrence of the Office of Government Ethics (OGE), is issuing regulations for NARA employees that supplement the Standards of Ethical Conduct for Employees of the Executive Branch, as issued by OGE, with a requirement to obtain prior approval for outside employment.
https://www.govinfo.gov/content/pkg/FR-1996-08-05/pdf/96-19742.pdf