Ex Officio

Lat.: from the office; by virtue of his office; officially.

EX OFFICIO MEMBER one who is a member of a board, committee or other body by virtue of his or her title to a certain office, and who does not require further appointment
EX OFFICIO SERVICES services imposed by law on a public officer by virtue of his office
Source: Barron's Dictionary of Legal Terms, Steven H. Gifis, 5th Edition; © 2016