ad vitam aut culpam
ad vitam aut culpam‘for life or until blame’. Many office holders are appointed on this basis, but the modern trend is to fix retirement ages; for example, judges are now appointed subject to a retirement age.
Collins Dictionary of Law © W.J. Stewart, 2006
AD VITAM AUT CULPAM. An office to be so held as to determine only by the death or delinquency of the possessor; in other words it is held quam diu se benegesserit.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.